with a little lower cr like 8/1.have you ran the cam on the wallace calc to see what the cranking cr might be?will you run pump gas?if so you could run a dial back timing on the dash for when you get on it.i am sure someone will have something to say about quench.i am not sure you need more than stk stroke but a 470 would be fun.you have a lot of detail to figure out but thay all take planning.
some info i ran.
Static compression ratio of 9.5:1.
Effective stroke is 3.54 inches.
Your dynamic compression ratio is 8.01:1 .
Your dynamic cranking pressure is 159.23 PSI.
Your dynamic boost compression ratio, reflecting static c.r., cam timing, altitude, and boost of 8 PSI is 12.37 :1.
V/P (Volume to Pressure Index) is 203