Here we go folks. These are the 331 kits from CoastHigh. Reliable and rock solid are the terms that come to mind when dealing with the quality parts from CoastHigh and probe Industries. These kits can be had in a few different forms. If there is a rod, crank or piston substitution you need to make, you just let me know either via email or the live support button on the far left of every page. Just let me know and I will make it happen. Pricing should not be your only concern, it's all about the "After The Sale" support and tech help that stands us head and shoulders above the rest.