First post and I need help. I'm getting into racing next season and of course the E-mods are primarily chevy powered. Being the Ford guy that I am, I want to use a 351 based motor preferably a Cleveland. But the only issue I see with the rule book for running a cleveland is the max valve size on the intake is 2.02 and the intake valve on a 2v Cleveland head and 73-74 4v heads are 2.06 and having to run a 4412 2 bbl carb. Below are the rules for the engine, looking for suggestions building a Cleveland around these rules that will make power around 7k rpm if possible. Thanks!
Heads - OEM cast iron heads only
- No aluminum or aftermarket heads
- No grinding, porting, or polishing anywhere
- Max Valve size 2.02 intake 1.60 exhaust
- Minimum chamber size 58cc
Valvetrain - Max .480 valve lift, measured at camshaft lift
- Hydraulic Flat Tappet Cam Only Maximum of .004 Valve Lash measured at valve
- must pull 15 inches of vacuum at 1000 rpm
- screw in studs permitted
- rocker rollers permitted; 1.6 to 1 ratio for Ford
- stud girdles are permitted
- shaft rockers not allowed
Rotating Assembly - Max of 175 psi compression per cylinder; race fuel allowed
- Any cast, hypereutectic, or forged piston allowed
- No stroking or destroking, 362 max allowed cubes; 4.060 max bore
- OEM or cast aftermarket crankshaft allowed Ford 3.50 max
- Only stock appearing cranks; no knife-edging or lightened crankshafts
- Minimum crank weight of 52 lbs
- 6'' max I beam rods, cap screw rods permitted
- balancing of engine permitted
Carburetor- Must be Holley 500 CFM 2 bbl 4412
- No grinding or polishing allowed
- Throttle Bore Max is 1 and 11/16''
- Venturi Max is 1 and 3/8''
- One inch spacer plate may be used
Heads - OEM cast iron heads only
- No aluminum or aftermarket heads
- No grinding, porting, or polishing anywhere
- Max Valve size 2.02 intake 1.60 exhaust
- Minimum chamber size 58cc
Valvetrain - Max .480 valve lift, measured at camshaft lift
- Hydraulic Flat Tappet Cam Only Maximum of .004 Valve Lash measured at valve
- must pull 15 inches of vacuum at 1000 rpm
- screw in studs permitted
- rocker rollers permitted; 1.6 to 1 ratio for Ford
- stud girdles are permitted
- shaft rockers not allowed
Rotating Assembly - Max of 175 psi compression per cylinder; race fuel allowed
- Any cast, hypereutectic, or forged piston allowed
- No stroking or destroking, 362 max allowed cubes; 4.060 max bore
- OEM or cast aftermarket crankshaft allowed Ford 3.50 max
- Only stock appearing cranks; no knife-edging or lightened crankshafts
- Minimum crank weight of 52 lbs
- 6'' max I beam rods, cap screw rods permitted
- balancing of engine permitted
Carburetor- Must be Holley 500 CFM 2 bbl 4412
- No grinding or polishing allowed
- Throttle Bore Max is 1 and 11/16''
- Venturi Max is 1 and 3/8''
- One inch spacer plate may be used