my slant buildup

and back to the valve lash questions a little earlier.... I wasn't thinking in terms of cam profile having an effect, I was more thinking that, except for moving to stainless SI valves, the rest of the valvetrain is OE stock, factory parts. The cam may be reground/ but it's still a factory Mopar 1974 "blank". I'm going with "stock replacement" lifters, OEM pushrods, OEM rocker arms and shaft.... I was thinking more along the lines of expansion/contraction of the various metals involved. as the metals heat up and expand, clearances go down. and I honestly ain't sure whether to expect more, or less, expansion, of valve stems/ moving to stainless valves.
I had a '69 D100 myself once, and have "fixed" another buddy's screwup where engines would "barely run" because previous people who'd had their hands into these engines before I did, that had -0- compression on one or more cylinders, just because someone before me had adjusted them "too tight" and the valves were being held open.... on that 69 truck, I had gotten it for a song, 2 young brothers had moved a few states South to live with their Dad, and became homesick, so they'd bought that truck to get them back here, "home" for them and their Mom. They had bought the 1st truck they could "cheap," to get them home. They'd "tuned it up" before they left//and talked of fighting the way it ran, all the way from No. Carolina to Illinois, I found out it had no compression on 2 cylinders, they'd converted it to a floor shift from 3 on the tree and then went so far as to buy a clutch kit for it, but never installed it because they felt they were "in over their head" because it went down the road in 1st and 2nd, but absolutely fell on its face when they went to 3rd so they thought it was "some kind of trans issue". I went thru the tuneup to include readjusting the valves, and compression came back. so I am leery of having them "too tight" on the exhaust side, at the Oregon Cams' spec of 0.012/both.