dave if ya machine the heads ,dont forget your intake and push rod holes if got the fat push rods as well ,have ya had it to the track again ,i was thinking the same dave with mine ,bigger cam 272/278 roller 12.1 comp but i said stuff it all and turned the bottle on now i have all the power that i can handle at the track and a car that runs pump on the street and your combo is perfect for nos ,dont even change ya converter and run good fuel at the track and run nines and drive on the street and run 10,s on pump that is sweet in any language . ian