Hello all,

I am considering building a car for the local circle tracks "Thunder Stock" class. The track is a paved 1/4 mile high banked oval, the fastest in the world they say. This class is completely filled with Chebbies, mostly Monte Carlos. Last week the fast qualifiers lap time was 13.469 seconds. I have copied and pasted the engine rules below. What do you guys think a engine good combo would be based on them? Could I build a 360 that would keep up? I know I need a properly set up car, we have another forum for that:)

10. ENGINE: Stock cast iron block, stock cast cyl heads and stock cast iron intake manifold are required. All engine parts must remain in their original “as cast” configuration. ANY modifications are illegal. Maximum displacement for Ford and Chevrolet engines is 360 cubic inches and 366 cubic inches for Mopar. Ford engines must be 351 Windsor block and cyl heads. Carburetor must be as installed by the manufacturer on the baseline model for said manufacturer (One 4bbl max, no aftermarket carbs) factory snorkel type air cleaner or 14" X 4" after market air cleaner with solid steel top and bottom. NO flow control designs and NO high flow elements will be allowed. Engine must be in stock location. Stock steel or rubber mounts are ok. One engine movement limiter is allowed (cable, chain or rod) HEADS: No aftermarket, bowtie, vortec/ swirl port or SB chevy angle plug heads are allowed. Valve lift is limited to .420 on SB chev and .450 on Ford or Mopar engines. Rocker arms must retain stock ratio (1.5 on SB chev ) NO aftermarket or roller type rocker arms are allowed. Engine compression is limited to 150 lbs ( 5 revolutions ) ZERO tolerance. OEM replacement pistons are allowed, symmetrical with 4 reliefs or dished with 5/64 - 5/64 - 3/16-ring sizes. Crankshaft must match block and model/year of car (weight/measurements). Crank will be teched. Powder coated connecting rods are not allowed.

11. Exhaust: Complete leak free, tight exhaust system with a maximum diameter of 2.25" OD must be run from the engine to an area behind the driver and must incorporate (1 or 2 depending on system) approved mufflers. No “H” pipes. Stock “Y” pipe allowed, no other 2 into 1 systems. NO center dump exhaust manifolds. Approved mufflers ONLY. 88-Decibel Limit.
(Mufflers that can be used: Napa 17713 or 17714. Dynomax and walker 17731 or 17732).


Thanks for any replies!!