Ok I have a question. I have a Mark 4 BBC LS7 block. I have decided to go roller cam. I have been reading The Big Block Chevy Marine Performance book and came across a paragraph that talks about putting a MarK VI roller cam into a Mark IV block. Basically it states to get a Gen VI upper gear (machined for the stepped Mark VI camshaft and bolt pattern) and then use a thrust plate from a Gen VI block, because all BBCs have provisions for the thrust plate as mine does. So my question is, if I get a Gen VI roller camshaft then do I still need the comp cam Retro Fit roller lifters (CCA-887-16) or do I need to use lifters from a factory Gen VI BBC. I am thinking still the retro rollers for this.
Right now I have a torrington bearing set up behind the upper gear and I also have a thrust bushing for the timing cover set up to about .008 clearance.
This is what I had for the regular hyd. camshaft.
Thanks.
T.J.