That's what I'm working off if regarding the pre-magnums having the 1.5 vs 1.6. For some reason I thought the 5.2 mags had 1.5 but that doesn't make sense right now.
The goal is to get the .432 cam from a 1.5 rocker engine, presumably not a 5.2 mag, and use it in a 5.9 mag with 1.6 rockers to get "almost" .460 from it.