hey guys iv just gotten my 327 sbc running after replacing the heads, cam and carb. Iv tuned it by ear as best i can and i have it running pretty good. There is a off idle stumble, but other than that it runs great until i shut it down then about 1-2 secounds later a loud backfire. i believe it is through the exhaust although there is a white smoke in the carb. where should i start looking?
thanx john