450/383. This is a version of the tried and true 474/400 combo we pioneered back in the 80’s. Back then we would offset grind cranks to a 3.9 stroke with a 2.200 rod journal. We would then use a 6.535 long GM style rod and those kits worked AWESOME! Today we just have the cranks made new out of 4340 heat treated steel and use a similar, but slightly longer 6.700 long rod. This combination is ideal for someone looking for a little more out of their 383. The 383 kits come with forged Ross dished pistons, chamfered bearings (we have chamfered 383 & 400 main bearings), file to fit plasma moly rings and competition balancing for a truly ready to go kit when you receive it.
496/383. This combination actually makes 489” in a +.030 bore and “496” in a +.060 bore. We just call it 496” because our original welded stroker kits that were the first on the market back in the 80’s were called “496 Stroker Kits”. This combination is a TORQUE MONSTER. 4.25 stroke, 6.535 and a 1.307 compression height dished piston (for pump gas compression) and is ideal for someone building the ultimate sleeper. Our 1.307 piston also stops well below an unmachined stock block deck surface. These Ross pistons along with chamfered rod and main bearings and competiton balancing