Degreeing Cam by Measuring Overlap @ Lifters

seabee said

Yes.

LA Small Block Hydraulic Lifter Camshaft.

To be clear, I'm not looking for advice or how-to's just curious as to why there were two different methods presented for degreeing and how they compare.

Click to expand...

That's a nice little cruiser, and a dual pattern with a typical longer exhaust. So as I posted above, the =lift on OL will be retarded ATDC about 3deg or so on that one with the lobe centers "straight-up" @112deg, advancing 4deg to center the =lift will be fine.
I guess there are a bunch of ways if You know what You're doing/looking at. As long as You're aware of & understand how diff open/close rate ramps & dual-patterns move the overlap center how much & which way, this method will work.