[ryanmctee]

Ok, installed new Holley carb and new HEI distributor. The truck had a HEI distributor and Edelbrock carb and ran. Ran lousy, but ran. Screwed up and didn't mark the distributor prior to taking it out. After installing the new distributor, I get a backfire through the carb. Have double checked all the spark plug wires and confirmed they're correct. I know everyone is going to say it's 180 degrees out, but I tried that too, and still get the backfire. I'd like some input on how to start from SCRATCH with a new HEI install. Find TDC, rotate the oil pump shaft, install the dizzy.

Any suggestions? Thanks in advance - Ryan