318 La with 360 heads

You didn’t mention the part about how the heads were ex-nhra super stock pieces...... or the aero package done to the crank, or the coatings, or the SS extra deep pan.

All those tricks, and it’s still over 80hp shy of 560hp 416, which is a very bread and butter bracket piece built with very generic parts and bowl ported RPM heads that flowed 270, 1.5 iron rockers, .560 gross lift cam.

So remove the aero package bottom end with the special coatings, replace the ex-nhra SS heads, the fancy pan, and the 1.7/1.6 rockers....... install the generic deep pan, no coatings bottom end, use std tension rings, bowl ported rpms, 1.5 rockers....... and it’s going to gain 80+hp?

You’d think if that’s how it would have played out....... they would have built it that way.