360 LA installing Promaxx Aluminum heads

I don’t know what there kids are like or come with. Are they like the Edelbrock series?

I was tuning up my sons new 360 with twin 02 plug Innovative set up. (Junk) That made life easy (when it worked)

Otherwise on my stuff, (before 02 - not year- LOL)
I’d select the smallest jet and biggest rod comp when the previous set up was way lean and the reverse, biggest jet and smallest rod for when it was aft so I could lean it down or richen it up.

Just realize that your dealing with the conference area around the rod in the jet when you make the changes. What I have seen some guys do not realizing the issue was move to a set of jets and rods that delivered the same area mathematically but ignored that the circumference was larger or smaller throwing there heads in a spin.

I think your on the right track FWIW.