new engine

[DroppedZ84]

Originally Posted by Slonaker

FWIW, all '86 and '87 trucks have one piece rear main seals, but they don't have roller cams.

IIRC, look again on the '87 blocks, they should be TAPPED for roller (the lifter "spider" retainer)
Also someone said "Nothing to special about a roller cam." Are you NUTS?! With a roller, you can get away with a larger cam that "acts" smaller, MUCH better performance.
Such as the GMPP 846/847 cam or the LT4 HotCam.
If I had the choice, I'd choose roller over flat tappet, EVERYTIME!

[NO LONGER DISTURBED KONCEPTZ]

Originally Posted by DroppedZ84

IIRC, look again on the '87 blocks, they should be TAPPED for roller (the lifter "spider" retainer)
Also someone said "Nothing to special about a roller cam." Are you NUTS?! With a roller, you can get away with a larger cam that "acts" smaller, MUCH better performance.
Such as the GMPP 846/847 cam or the LT4 HotCam.
If I had the choice, I'd choose roller over flat tappet, EVERYTIME!

Plus they last longer and do not have the same stress as a normal cam. Why do you think from 96 on the motors were built will Roller cams.