i know on pre 87 block or whatever chevy used non roller cams and blocks.I hear people talking about you need to get some provision to use a roller cam on a pre 87 block,what is this part and where can i find one?Thanks.

 

You just buy retrofit roller lifters. They're paired up with a tie-bar between them to keep them oriented correctly. Crane makes 'em, CompCams makes 'em, Summit and Jegs sell 'em.

You'll also need a button or thrust bearing up front to keep the cam in place. Talk to Crane or CompCams tech support for details, I've only seen an engine built this way once and never done it myself.

 

Yeah, all the rest of us had been building roller motors for decades before the factory finally got hip to the idea. Too bad they let their engineering department's summer intern's junior project find its way into production... the older way is so much simpler, cheaper, more reliable, and all-around better than the crap the factory uses.

Like the above post said, the lifters for each cylinder are joined in pairs with a link bar to maintain their alignment with the cam; and there's a cam button (some are a roller thrust bearing, some are a plastic button) between the nose of the cam and the timing cover to retain the cam. No special block castings, no machine work whatsoever, no special cam design, the same timing sets as always, etc.