It sure was easier decades ago before the internet. Look at some catalogs, read the specs, the characteristics and what was needed (c.r., intake, exhaust, gears etc) and make a choice. Back in the early 90’s I picked a version of this cam for a 400 b-block in 70 pickup, actually had a little lope considering the specs, but I picked it based on what I had. Was a great cam, throttle response, pull etc. Just an example:
Erson-PBM-World-B2C | E420121 - Erson Cams - Chrysler A V8 TQ20H
Sometimes doing it the old fashioned way is all one really needs, IDK, but so far for the OP it sounds like the symptoms of “TMI” :lol: You’ll get it figured one way or the other.:)