Originally Posted by S10 Racer
What specific machine work needs to be done on a SBC to install a roller cam? I don't want a retro fit kit. Thanks
Depends on the year of block. Before 1986 all use the aftermarket roller where the lifters are aligned with a tie bar and thrust is maintianed with a button ridding between the cam nose and timing case cover.
Starting with the factory roller cam age in 86 up through 95 there is a mixed bag of engines that have no provisions for a roller, some have the casting modifications but no machining and others are completely provisioned for a roller cam even though they may have a flat tappet cam and lifter set installed these are exclusivly found in trucks. Some of these can be identified by block casing numbers, I offer some data which I'm sure is not complete:
1986 through 1995:
For 350 flat tappet blocks without provisions for the OEM roller look for casting number 10054727, 14079287, 14088548, and 14101148. Be careful of 14101148 as there is a roller block 14011148.
350 blocks that are roller provisioned, even if currently using a flat tappet cam look for 10243880, 14011148, 14088526, and 14093638 all of which can be 2 or 4 bolt blocks. The 880 carries across the 1995/1996 divide being used as a flat tappet cam, swirlport engine in 1995 becoming the L31, Vortec with roller cam in 1996 up thru 2002 production. It is still found in crate engines.
Starting with 1996 production all SBC Gen I blocks are roller provisioned and come with a roller cam which includes 10243880 .
The roller provisioned engines with a flat tappet cam can be changed to run the factory or aftermarket OEM style roller cam with the purchase of the spider, dog bones, thrust plate, and fasteners this can be had as a kit with or without the lifters.