1956 Chevrolet 265-225hp Stock Legal Piston

[X-TECH MAN]

Originally Posted by Chad E532

Does anyone know of a piston manufacturer that has a stock legal piston for the 225hp 265? I cannot find one in the NHRA guide, but would think that someone is making them for the IHRA folks.

Thanks
Chad

IHRA has a different piston rule for stock in the last several years. Only the top (combustion chamber side) of the piston has to "LOOK" correct when viewed from an assembled short block. The dish/dome still have to measure correct. They dont care what it is like below the deck (moved rings, thinner ring pack, lite pins, lite pistons, valve relief location and depth, etc.). They DO NOT want to look at a piston and rod out of the engine. Sometimes they do want to have an oil pan removed to eyeball the crank.