Originally Posted by Gearhead346
Thanks guys for the input, I just realized that rotating assembly is with 6" rods vs. 5.7" rods. This was the whole reason I was buying a small base circle cam because of the 5.7" rods. Won't 6" rods cause rod to block clearance issues and cam to rod clearance issues? So with the small base circle cam I would be good with 6" rods, but not on the block side. If it does have clearances issues can I grind the block slightly to make it clear? I almost wish I could buy an assembly with 5.565" rods but they don't even make them anymore
6" rods will have the same cam and block clearance as 5.7" rods, if they are the same brand/type. 6" rods are just longer in the beam area, they are the same as 5.7" rods at the big end and the pin end.
Many aftermarket SBC rods now come "pre-cam clearanced" but you will still need to check cam-to-rod and rod-to-block clearance at trial assembly to verify that you have enough room. Small base circle cam and cam clearanced rods will almost 100% clear each other at the cam size you are looking at...but you, THE BUILDER, still have to check it.
Block should clear the big end of the rod, as it was cast to clear the long 3.75" stroke from the factory, but you still have to check it/mock up, and grind block if neccessary. Block clearance is usually only a problem when putting a 3.75" or longer stroke in a 350 block, or when using aluminum rods with the stock 3.75" stroke in a 400 block.