I'm not sure how much angle on the lifter bottoms there are between stock and low taper confused
Not sure how to measure them either realcrazy
i have had several sets of the early (Pre 1968) Mopar solid Hemi lifters reconditioned by a company in Seatle, WA work
Maybe you can have yours done too locally scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)