backfire through the carb.

I like it alot and contrary to what is said it may not need an adjustable valve train. Mine is fine with stamped steel arms. You just gotta check the lifter pre-load to make sure it's ok. If so your good to go. BTW: Last tuesday night T&T I ran mine for the first time since I put 3:55 gears in it. The gears really dropped the perf. from what it was like when it had 4:10's but it still ran a 13.61 at 102. But the 3:55's are tons better cruising gears and we do alot of cruising. The night I took it to the track was a screwed up deal. They had super stock cars there and were letting them run 4-5 times to our 1. I got there and tech'd in at 5:55 and my first run was at 9:08. Even after all that idling and running it I checked the fuel mileage and got 12.8 mpg. It'll easily get 15-16 mpg (normal cruising) and runs mid 13's with iron heads and can idle in traffic for hrs. with no trouble.