this thing is annoying me. I have an edelbrock 600cfm part# 1406 carb on top of a performer intake running into a stock 454, stock except for the comp 4x4 cam inside it anyway. So when ever I try to drive this thing with the motor cold I get multiple backfires through the carb. It clears up when the engine is about 200 degrees. Anyone else had these problems? Is maybe the choke causing this to happen? I know I know, get fuel injection!