Single or Dual Pattern Cam

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.:)