How is this cam for 470

Are the 906's currently stock?
I think 10.7 is a lot for the cams considered and a iron head. I myself would build it with a little less compression in mind.

Insider your piston choice for a future head. Porting stock iron heads can end up costing you a lot. You very well may want to save the money for the Trick Flows instead of porting the iron.

Who is doing your work?