need help please

ok i switched the RS from TBI to carb

i used the mallory 3 port regulator and all

HEI from a 71 Nova

600 CFM Holley Carb

when its running it misses and pops out the exhuast (NOT Backfiring) just popping

i checked the plugs and replaced them cause i thought they may i have been fouled out

i double check the firing order as well

i am completly Stumped can anyone help??

Not sure about the problem, but that distributor sounds a little funny... since HEI didn't come out untill mid-74. Are you sure its an HEI, and not a points distributor?

Is it missing at idle speed or when you give it gas? Check your mixture. Mine did the same thing when it was running rich.

ooopps the damn floats were outta adjustment