Hello, I have a 68 Dart, 340 .060 over 9.98:1 static compression, 422 ci. I am running W-2 heads which have been previously ported square (no flow numbers), with a matched LD340 intake, also max ported and modified to work with the W2's. The heads and intake came out of Reno, NV, where I was told Walker Evans had ran the set up on one of the desert race trucks. I believe I could use a different carb to help maximize my performance. I am currently running a Holley 750 vac secondary with a proform main body. 22 degrees initial advance, 36 total. MSD Billet distributer. Camshaft is a Hughes engines grind: Camshaft Technical Details Intake Valve Lift 1.6 Exhaust Valve Lift 1.6 .569" .579" Intake Duration at .050" Exhaust Duration at .050" 237° 242° Lobe Separation Angle 107º Intake Centerline 104º Intake Opening at .050" Exhaust Opening at .050" 14.5° BTC 51° BBC Intake Closing at .050" Exhaust Closing at .050" 42.5° ABC 11° ATC Min. Suggested Cylinder PSI 160 RPM 1800-6200 I am running 1.6 rockers. What carb would you suggest? 90% street use, summer only, with a weekend or two at the strip. I am at 6000 feet elevation, which I know doesn't help. Thanks in advance!