just bought an Old camaro with what looks like a pieced together 350. the cam sounds pretty radical. it has vortech heads and edlbrock RPM intake with edlebrock 1411 (750 cfm) carb and factory HEI ignition. I changed the plugs because it was just not running great and figured that I would start tuning. I am having a heck of a time. Its backfiring through the carb when I rev it. It sounds like one cylinder is missing, but not all of the time. Compression is 190 on every cylinder. I have adjusted the timing every which way possible but it runs the same. Plug wires are new. I have checked firing order over and over. when I looked up the edlbrock web site it says that the 750 is not recommended for small blocks. it also said that the 750 carb is not recommended for the RPM manifold. I haven't had a muscle car is 25 years and I was a holley guy back then. any advise or suggestions would be much appreciated. I do not know where to start...