crwdns2934241:0crwdne2934241:0 Billy Whiteman

crwdns2934249:0crwdne2934249:0:

Good chance timing is off &/or a bad valve. I believe that backfiring is from too much fuel at wrong time in combustion chamber. Not a trained mechanic, but, a life long small block Chevy owner. Hope it helps

crwdns2915684:0crwdne2915684:0:

open