Love cool build threads like this one.
Seems like a really wicked motor build, and the cyl head porting looks spot on - reminds me of when I ported mine. Messy and time consuming.
And your "firethorn red deluxe interior" - My Bro had the same in his '76 455 T/A, and I still have a brand new full set of Firethorn Red seat covers in my basement for the last 40 years that he never installed