10 sec 6.1 ?

Well the 392 makes what, 525 HP? That's enough to put you into the tens in a 3100 pound car with a good chassis. I don't see why that can't be done with a 6.1. The heads are easily ported to 300 cfm's of flow at .600 lift and that would support 600 HP with the rest of the appropriate package.

You need to ask around and find some people that are running those numbers and see what they are using so you can get an idea of what works and what doesn't.