Just watched Nick on YT running the 520cube 71 GTX engine.
It has answered a lot of questions real quick for me!
Don't use a stock intake or stock exhausts lol...
But the real question is?
How good or bad 'are' the Stealth heads...
Can I 'out-port' them with iron???
We did buy a set back in 2005 and fitted them on a 543 engine with high compression.
It was pretty new stuff back then and I think it ran high tens in a street car (65 Coronet).
I would be happy with 11's with my homeported 902's and 511 cubes.
Start with an Edelbrock Torker and then hopefully an iron six-barrel...