Ive heard of people using 5.315 rods for 331s and ive heard people using 5.400 rods. which one is actually used for a 331 with a 3.25 stroke crank? thanks. all help is greatly appreciated.
Most of the stroker kit's use the 5.400" rod. I believe the 5.315 rod is used in the CHP street fighter 347 kit to keep the oil rings away from the wrist pin. I would think using a 5.315" rod in a 331 would be silly, cuz there is no need for for extra compression height, and a longer rod is better.