What motor do you have? What the spec on the cam? What dist/ign box are you using?
On my 340 in my 67 had RPM Performer heads with a Crower solid that was 248/252 and .525/.528 with all MSD stuff and it would sing all the way to 7200-7400 until is just wouldn't pull anymore. I think the...
I didn't have em on my 67 340/727 Dart. I dont know if it contributed but I couldn't keep the TC bolts tight for the life of me.... I also broke 2 TC in that thing. An old timer told cause I didn't have those braces
Grinding out the wheel wells sucked..... I didn't think I was going to be grinding away at it so much so I wasn't wearing a respirator so I stopped when my lips went numb cause there was still a little chem stripper residue.
I bought a 96 12v parts truck for $900 that if I looked into a little more before I tore it apart, it wouldn't of taken much to have it driving and in sellable condition..... But I got the parts to P-pump my truck now:supz:
Keep your eye out for mechanic specials... My buddy got his first 1st gen for $3000. It had a fresh paint job only had 258,000miles and it wouldn't run right.... turns out all it had was clogged fuel filter. So $3015 he had a cummins!
The guy who had my 67 before me had a 273 in it, it was a stock long block with a HUGH solid cam, single plane manifold, and a 750-800holley and that thing wouldn't make power till about 4000 and then would tap out at about 7800-8000. It didn't last too long though.
I'd say free up the exhaust...
Did he do head studs? I have a few friends with twins only one of them have studs and o-rings the rest just have studs and they see anywhere from 55-75lbs. Both blocks have the same number of head bolts.... some just get lucky with HG. I did, I was over spooling my HX-35 and could hit 47lbs...