Did some research, I didn't find the Isky individual part numbers, but .842 diameter lifter choices for tall lifter bore from Isky are
372-LO-180
372-96-RH
372-96-LO-180
302-LO-180
1341-LSH
1341-LO
1341-LO-150
302-96-RH
302-96-RHM
Thats a lot of choices!
RH LSH & RHM have pushrod cups on center
1341-LO are 8 centered & 8 .100 offsets
-150 are 8 centered & 8 .150 offsets
-180 are 8 centered & 8 .180 offsets
Pontiac Guide Bars are GB-900
I'll work on Crane, Comp, Crower, shubeck, lsm, and others over the weekend and early next week, do some consulting with Bob and maybe we can Get the manufactures to package a "Raised lifter boss" Pontiac roller lifter part number.
Personally I ran offsets on all 16 lifters for Superchiefs, might be useful on Tiger heads, exhaust valve pushrods get really close to the front and back of the block.
-Rob
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