So, I'm running a 383 stroker in a 74 Ventura (Nova sister car) and will be moving it to a 73 Nova here soon. Now on to the issue. I have great power. Thing pulls awesome. However, if I jam the throttle, there is no hesitation, no stumble, runs up no problem at all. If I slowly roll out of the throttle, no problem. If I just let go of the throttle after reaching speed, it dies. Completely. Now on to the specs. About 8.5 to 1 compression. Professional products hurricane high rise intake manifold, NGK plugs, Summit hydraulic flat tappet cam with .496 @303 intake and .506 @313 exhaust. Proform 750 race series carb (holley 4150 style) crappy ported 882 heads, summit long tube headers to dual 2.5 inch exhaust, HEI distributor, Summit racing CDI ignition box. Another thing I have noticed, when the car is in neutral and I hit the throttle, a nice black smoke pours out of the exhaust on both sides. Not a blueish oil smoke, but legit rolling coal black smoke. Maybe too much jet in the carb? And no, I don't know what jets are in it. Fuel pressure is also good. 7.5 PSI electric pump return style regulator.
