My 68 Roadrunner had a 440 with 10 to 1 pistons 906 heads with 4 speed and a RPM intake with a Demon Carb and headers. It ran awesome , I loved that set up !!!!!!!!!!!
Only problem I had was I wiped out a lobe on it .
I would build another just like it and plan on doing just that in a year or so .
Dave