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375 Cubic Inch Garvey
If anyone has a question or needs an explanation about any rule in this class, refer
to the engine Committee for verification. Every engine must have two intake bolts drilled (across from each other) for
sealing purposes. V-Drives Permitted. Block Any cast iron block, OEM or Aftermarket, as long as
it meets General Motors 350 ci., Ford 302 & 351W ci., and or Chrysler 340 & 360 ci. OEM specifications. No 400 Cubic Inch blocks may be used. OEM Lifter Bores Mandatory. OEM Cam location Mandatory. Deck Height for selected Block
to be within 0.20 +\- of OEM Spec. Block Bore not to exceed:
Chevy 350- 4.065, Ford 302,351W-4.065, Chrysler 340ci.-4.075,360ci.-4.065. Splayed Main Caps are Allowable. Line Boring is Allowable. Decking is Allowable (average deck height to be zero or less).
Crankshaft Strokes are to be OEM and In-kind to Cubic Inch and Manufacturer of block being used (no stroking or de-stroking). 350 GM Stroke: 3.48 351W Ford Stroke: 3.50 302 Ford Stroke: 3.00 360 Chrysler Stroke: 3.758 340 Chrysler Stroke: 3.313 Aftermarket Crankshafts meeting
OEM Specifications for cubic inch block being used will be allowed. Journal Sizes must meet OEM Requirements and can be cut up to 0.040 under OEM
Standard. Drilling for oil will be allowed. Balancing will be allowed. No Ultra Light, No
cut down, No knife-edge, must be stock in appearance. Crankshaft must be cast
iron or steel, No Titanium.
Connecting Rods Connecting Rods may be
OEM or Aftermarket, with OEM or aftermarket rod bolts. Connecting Rods must be of
Stock OEM Length measured center to center and contain an OEM
Rod Journal Bore for Block being used. Connecting Rod pinhole may
be bushed. Connecting Rods must be Steel, No Aluminum or Titanium.
Pistons Any flat top pistons with
two relief cuts only. No dome pistons. No Ultra Lites. No Thermal coatings on tops of pistons. Any three ring combination. Compression height OEM (+/- 0.010). No machining except for balancing
and valve relief cuts. Minimum piston weight no less
then 430 grams.
Camshaft and Timing Chain Camshaft shall be any OEM style hydraulic or solid lifter cam. No mushroom or roller
style cams Allowed. Lifters must be OEM
stock size. No belt or gear drives Allowed. OEM style chain drives
only (double roller acceptable).
Oiling System Wet Sumps Only (No dry sumps). Any wet sump pan acceptable. External oil coolers are Allowed. Remote Oil Filters are Allowed.
Cylinder Heads Cylinder Heads must be
Cast Iron OEM Only No Bowtie, No SVO, No Direct Connection, or Cleveland heads may be used. No Porting Or Port Matching of any kind on either heads or intake manifold. No Acid porting or Spray
welding may be performed. Jesel type rocker arms and
related Jesel parts are not permitted. Roller Rockers are permitted. Ratios are as follows: Chevy-1.50, Ford-1.60, Chrysler-1.60 Dual Coil valve springs are
permitted. Only steel valve spring
retainers may be used. Any Valve Keepers May Be used. Screw In Studs and Stud Girdles are Permitted. Valves Type
Intake
Exhaust
Rocker Arm Ratio Chevy 1.94
1.50
1.50 Ford
1.85
1.54
1.60 Chrysler
2.02
1.60
1.60 Valve Stem must be stock OEM
Diameter. Titanium Valves Not Permitted. Pro-Flo Valves Allowed.
Carburetion Carburetor Types Allowed: Holley, Quadrajet, and Edelbrock. Carburetors are to be
750CFM or smaller. No Barry Grant, No Demons, or
Predators Allowed. Venturies are to be OEM with NO Polishing or Modifying Allowed. Over sized Jets and
Power valve Modification will be Allowed. Removal of choke Butterfly and
related hardware is Allowed. Removal of Air Horn
is not Permitted. Any Aluminum Four Barrel Intake Manifold may be used. No Sheet Metal Intakes Allowed. Wedge Specification And Valve Job Sheet Attatched. Ignition Any OEM or Aftermarket
Distributor, Coil, HEI, or MSD type Allowed. No Magnetos Miscellaneous Specifications Any Gasoline type Fuel, Example Fuels: VP, CAM 2, Torco, Sunoco. No Fuel Additives Allowed. Fuel Injection, NOS, Propane, Oxygen, and Alcohol are Not Permitted. Any Exhaust is Allowed =====================================================
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