Tazewell Speedway Classic Car Rules
Bodies and Attached Parts:
· Bodies must be made of fiberglass and in the style of 1932,
1934, of the the 1940 era cars. Must have solid firewall and floorboard.
· No covering of side or rear windows is allowed. The passenger
side window must be cut out to allow driver exit. A roof hatch is allowed.
· No part shall protrude through the hood other than hood retaining
· No mirrors allowed
· Side nerf bars can be of owners design as long as they protect
from tire climbing as much as possible. The front and rear of the nerf
bars must be curved in toward body closer than outer edge of tire. No
open end bars exposed to other cars are allowed. The nerf bars can come
through the body and connect to the roll cage and or the frame. They
cannot be built of any stock over 1 ¾"" outside diameter.
· A firewall and floorboard must cover as much of interior area
as is reasonably possible. The firewall and floorboard may be constructed
of aluminum or metal.
· The frame must be from the 1978-1988 mid size metric GM. 106"
wheel base minimum.
· The frame is required to have an x-brace built in to the bottom
· Only steel shocks. $75 buy rule per shock.
· A fully adjustable dual master cylinder brake pedal and master
cylinder assembly is allowed. Any aftermarket steel caliper is allowed.
· Springs, minimum of 5 inches outside of diameter. There is
no minimum or maximum length requirement. Front and rear springs must
mount in original locations. No coil-over shock and spring combinations
allowed. The spring mounts on the top of the rear end housing can be
made or modified so springs set on them properly.
· Weight jack bolts are allowed on all 4 corners as are spring
buckets. The side of the frame beside the front springs can be cut out
to owners choice.
· Any size diameter front sway bar is allowed from any stock
production vehicle. Any mounting and adjustment design can be used.
GM, Ford, Chrysler or other allowed. Any rear sway bar allowed.
· Any power steering gear allowed that will bolt on original
· Any power steering pump and pulley assembly allowed. Any manual
steering box allowed. Steering quickeners are allowed. No rack and pinion
· Tie rods, drag links, idler arm and steering arm must all be
OEM parts for this chassis. Steering box and idler arm can be shimmed
at the frame mount for best alignment or clearance problems as from
wreck damage or front frame rail alignment.
· Aftermarket steel rotors are allowed on front spindles and
any size lug studs are allowed. OEM rotors can be reinforced for safety.
· Only metric 1978 to 1988 chassis spindles are allowed. No big
metric spindles allowed.
· Both front lower A frames and all 4 rear control arms must
be stock and original length. Stock rear uppers may be modified.
· All frame and control arm mount points must be in original
· Any upper A- frames can be of owners choice. Any location is
allowed for vertical placement of inner mounting point of upper A- frame
or center line of A- frame pivot shaft. No minimum clearance from frame
to pivot shaft centerline is required. Upper A-frame mount holes can
be slotted vertically of horizontally if wanted.
· T he front chassis cross member can be trimmed off below drag
link assembly for ease of repairs or clearance.
1. A catch can is required to be connected to all radiators.
· Radiator must mount in front of engine.
· OEM type belt drive water pump.
DRIVE SHAFTS AND UNIVERSAL JOINTS:
· Steel driveshaft only.
· A driveshaft loop is required just rear of the front u- joint.
· The driveshaft must be painted white.
o All cars are required to have a master shutoff switch mounted in clear
view and reach of the drivers window for easy emergency crew access.
o OEM type distributor is required
o No traction control
o No radios are allowed
· No 265, 283, 302, 327, 350 or 400 engines allowed.
· Only 305 cubic Chevrolet engines allowed. They must be original
1 or 2 piece rear main seal design. Cast iron blocks only. No 4-bolt
main blocks allowed. A maximum of 0.060 overbore plus tolerance equaling
3.806" allowed or 316 cubic inch. No additional tolerance allowed.
· Legal heads consist of the cast iron emissions GM factory head.
These heads will have a casting number of 376450 or 14022601 only, with
a minimum combustion chamber volume of 53cc. They must be totally of
the same design as original on the early 305 engines such as valve angles,
valve cover mounting and total bolt pattern for head bolts and intake
bolts. Any head that shows definite performance gains will be omitted
from competition. No vortec head or intake combination allowed.
· No porting or polishing allowed. Valve face and seat angle
combinations are to owners option. Valve guides and seat replacement
is ok but do nothing to improve placement or locating angles. Heads
are meant to only have a good basic head job done and nothing to build
significant horsepower gains in flow or other characteristics. Resurfacing
is allowed. The boss shoulder where the short head bolts go through
can not be shorter than 7/8" or 0.875". Head gaskets must
be no less than 0.038" minimum thickness after compressed.
· Balancing of all rotating parts allowed. No excessive metal
removal. Must be a GM stamped crankshaft. It can have your normal engine
rebuilding work, but no major weight saving or knife edging of throws
allowed. Journal radius work is ok. The stock 3.48" stroke must
be maintained. A 2.065" rod journal allowed. The oil flow holes
may be chamfered.
· Minimum crank weight of 50 pounds.
· Any of the 5.7" length normal production line stock GM
rods for small blocks allowed. Only 2.100" rod bearing size rods
can be used. Any rod bolts allowed. The beams cannot be polished.
· Valves must be of original 1.50" and 1.84" diameters
or smaller. Aftermarket stainless steel valves or such equivalent are
allowed. Brush or swirl finish valves are allowed but no mirror finish
valves. OEM stem size is required. Valve springs cannot be more than
1.275" diameter. Springs can only be of original style consisting
of 1 outer spring and 1 inner flat style damper spring. Springs must
have no more than 120 pounds closed seat pressure.
· Any type steel spring retainer and keeper assembly allowed.
Any screw- in or press-in rocker studs allowed. These include 3/8"
or 7/16" rocker studs. Guide plates are allowed, as are hardened
push rods of any length. Stud girdles are optional. Stamped steel long-slot
rocker arms, roller tip rockers, or roller rockers are allowed. Rocker
ratio is optional.
· The cam must be a flat tappet hydraulic design with original
size diameter lifters. No mushroom or roller lifters allowed. Hydraulic
lifter only. The cam lift cannot exceed .420" at the valve. This
is checked with a solid lifter in place of the hydraulic lifter. A 0.005
tolerance will be allowed or maximum due to production tolerances allowed
by cam manufacturers. Nothing more than that will pass as legal. This
is the maximum lift allowed regardless of ratio rocker you have chosen
· Pistons can be cast or forged. They must have 4 eyebrow marks
defined in the piston dome flat top design. Defined dish pistons allowed
with only 2 eyebrows but no solid dome pistons allowed. Wrist pins can
be floating or pressed and bushings allowed. No gas porting of pistons
from the top allowed.
· Block decking is allowed. This is checked with a straight edge
held in line with wrist pin and engine cranked over with starter. Piston
must not hit straight edge above block while cranking. All normal engine
rebuilding machine work allowed on block. Oil drain holes can be screened.
Oil paths can be polished to assist in return flow. Do not get exotic
with your work as you could push over the limit. Minor work is allowed.
· Any standard production stamped GM small block Chevy intake
for trucks and cars allowed. Commonly used casting numbers are 14057055,
14014432 and 10185063. They can be of 2 or 4 barrel design and cast
iron or aluminum. They must be of the late model emissions type with
EGR valve mount on the intake. It must be plugged off and not functional.
No vortec, off- road or marine intakes allowed. No porting or polishing
allowed. A carburetor spacer or adapter with a 1.5" maximum thickness
· Any timing gear and chain allowed. No gear drives allowed.
A cam walk button and cam thrust bearing allowed.
· Any harmonic balancer may be used. There is a One Hundred Dollar
and no cents ($100) buy rule for balancer.
· Engine location is to be setting as close as possible to the
center of the race car chassis between the front frame rails.
· Setback -Second plug back to be no further back than center
of upper ball joint. 1inch tolerance.
· Any header may be used. There will be a $300 buy rule for headers.
· Box stock Holley 2 barrel 4412 only. No other 2 barrel or 4
barrel carburetor allowed. $400 buy rule on carburetor.
· Any fuel pump allowed that mounts on original engine fuel pump
location. No belt drive or electric fuel pumps allowed.
· Any air cleaner is allowed as long as it does not force outside
air into the air cleaner as in a ram air effect. Any flow directional
device used inside the air cleaner is permitted.
· A fuel cell is required of no more than 8 gallon capacity.
It must be mounted above and between the rear springs. Rear side of
fuel cell can not be further than 3inch rear of rear most point of rear
end assembly cover. A maximum of 2270 cubic inch outside displacement
· Engine must retain a wet sump system. Flow routing can be of
owners choice. Remote oil tanks are not allowed.
· No dry sump allowed.
REAR AXLE ASSEMBLY:
1. The rear axle assembly for 78 thru 88 midsize GM metric cars such
as Monte Carlo, Cutlass, Regal, or Grand Prix. Either 7.5" or 7.625".
2. No 9 inch Ford or quick change rear ends.
· Gear ratio -Any
· The carrier for the ring gear can be of owners choice and either
steel. It can be a spool, locker positrack, and spider eliminator or
· Standard drum brake set-up and/ or disc brakes on rear axle
1. Only the GM TURBO 350 automatic transmission is allowed. No turbo
400, Power Glide, or MANUAL transmissions allowed. All length 350 turbo
transmissions allowed. Cases with Chevy and B. O. P. bolt patterns allowed.
2. A stock torque converter is required. A 12 inch outside diameter
· No valve pedals.
1. Maximum tread width on front and rear is 76 inches.
· Width is determined at the axle of the spindle centerline and
at the widest point on the tire sidewall.
WEIGHT REQUIREMENTS AFTER RACE
· Minimum car weight is 2400 pounds with driver after race.
WHEELS AND TIRES:
1. Only 8 inch wide and 15 inch diameter steel wheels allowed.
2. Only 2 inch, 3 inch, and 4 inch offset wheels are allowed on either
3. Only 8 inch wide by 15 inch tires
4. 26.5 or 27.5 American Racer Medium Compound or Hoosier Medium Compound
See Tazewell Protest rules
See Tazewell Safety Rules
Track reserves the right to delete, change or amend rules in the interest