Ok guys i purchased a mid life crisis toy, old 77 nova kinda sort of drag car that im trying to get back on the street. My first question is it has a 468ci, approx 10.5 comp, victor 454r intake with a nitrous plate and a 2inch spacer topped by a holley 4150 carb built by pro systems, msd 7al-2 ign, with a msd hvc 2 coil, lunati #40220 cam...620 in .632 ex ? the heads are old gm factory aluminum heads cast #3946074 that were worked by air flow research, they have the exaust ports welded up and made into "D" ports, do you guys see a prob running this motor on the street ? Any recemended changes ?...... and 2nd question is that i have 1 3/4in o.d. tube headers, but the D port size is "2in" wide X 1 3/8 in" tall. is their going to be a flow prob because of the smaller header size ? do i need bigger tube headers ? This is what happens when you purchase on a whim...