Inliners International Forums General Discussion Hi Performance Building a 302 GMC for LSR

I've seen a block (alloy SBC) with those bushings. Would there be enough metal around the lifter boss to move it that much?

I ask as I figure you would have to go with a billet cam core or one that's been hard faced. I don't know which would be cheaper. As there isn't a large market for the billets and you would likely want a larger base circle (with a commensurate larger core diameter to stiffen the cam) a custom billet could be made to bring the lobe directly under the tappet. As the flat tappet lobes are offset from the center of the lifter bore some to facilitate tappet rotation (or at least it looks like it).

That would reduce the need to offset the bores as far.

Would you want to use a vertical link style roller tappet, or the kind with the rivets in it to engage a raceway (keyway, pilot groove, ???)? The riveted ones are somewhat more expensive (from what I've seen) but you wouldn't need custom link bars for them (not sure it that's a big enough PITA to care about when you're that far in).