Newer vs Older

Somewhere in mid ? 80's they went to hydraulic lifters, which is no big deal. I think the last slant came in a 88 pickup?? You will find some things like the super six (2 bbl) to be pretty common in , later 70's, also the exh man had ribbing starting in 70 something ?? that gave it better strength. Basically a slant is a slant IMHO.