I have a 1989 5.0 EFI with Holley Systmax upper & lower, Holley heads milled .050 for 57 cc good for 10:1 cr, 1.7 roller rockers, .509 Lunati cam, 90 mm Mass Air, 73 mm TB, 24 lb injectors and Jacob's ingition system.
I have good low end torque and will rev to 6250 quick. 305 rwhp & 308 rwtq but I think there is more to be had. Dyno shows torque and hp from 3000 to 6000 almost flat line.
Dwight
