My thread, if I recall, was kind of "piecemeal".
Crane was actually "on hiatus" for a bit, for a reorg. (Bankruptcy?) Some of their stuff became difficult to find.
But there are other cams around that are similar to the 272. I want to say Crower had one with similar specs. Maybe a bit longer duration. 280-something comes to mind.
Many people recommend using only GM lifters. They're more expensive, but that may be for good reason. (10-15 years back, there were a lot of stories about Crane cams - especially 272s - wiping lobes in short order. I never had trouble with my 272.)
My pushrods were nothing special. Stock length. Possibly Comp, but I'm not sure.
I used the 1.52 ("stock" ratio) Comp roller tip rockers. Didn't see much point in going full roller.
Keep in mind that when you approach the 272's lift numbers, you will need different springs, and may need to have the spring seats machined, in order to leave enough room for the coils. Stock springs with a 272
will coil bind. Stock springs with a Crane 260 (which, coincidentally, came installed in the old GM HT 3.4 crate engine) should not bind.
Hope that helps a little.
Edit... 1.6 rockers are, IMHO, a bandaid.
Since you are going to be into the engine, anyway, just buy the cam with the specs you want, and use the stock ratio (1.52) rockers. It's what the rest of the valvetrain was designed for. It's also what the cams are usually designed for.
Also, it's been a while since I did all of this. If I have said anything blatantly ignorant (or just stupid) I hope that someone will jump in.
[This message has been edited by Raydar (edited 04-29-2021).]
