Thanks in advance for any help. I built a 460 with 10:1 compression, MSD box, mild cam, headers, magnetic dist., and a 750 carb. I have a series of small backfires confirmed from cylinder 4 (passenger's rear-most). I swapped out the plug, changed the wire and cap, readjusted the valves, triple checked the firing order, it runs great accept for the backfire. Do I have a valve problem? Thanks
- posted
18 years ago