I just started my engine after several months of putting together. I ordered the shortblock from AutoZone, had the heads redone at the machine shop. I installed all new push rods, valve springs and roller rockers. Everything else is brand new. I swapped out the oil pump that came with the engine for a Melling HV oil pump. Everything seems to be working fine. The engine fired up immediately and ran much smoother than I expected. I only ran the engine for a couple minutes (mostly to burn in the paint and check for leaks. I have not adjusted the timing yet but can tell it is very close to TDC. Like I said, idle is exceptionally smooth. After a couple minutes (no more than three minutes for sure) I noticed 5 of 8 of my ceramic coated headers were beginning to glow cherry red. The engine is producing approx. 73 pound of oil pressure and water is circulating throughout the engine. After the third time I started and shut it off it backfired after about 3 - 5 seconds. I started and shut it off three more times (after allowing the engine to cool a little), all three times it backfired through the exhaust 3 - 5 seconds after shutdown. I pulled the valve covers, loosened all of the rocker arms and (starting from scratch) adjusted all of the valves. I'm using hydralic lifters. The engine sat for about 1.5 hours before starting one last time before turning in. The engined fired right away, ran very smoothly and after about two minutes I noticed the headers starting to glow again and shut it off. After about 3 -5 seconds it backfired. Now I'm beginning to worry the engine is not getting water and oil aound the heads to properly cool the engine. I have not ran the engine more than a couple minutes at a time and have only started it 8 times. I can probably figure out the backfire, but I'm really concerned about the glowing headers. Has anybody else experienced this problem? I don't want to run the engine again until I have something to go on. Any suggestions will be greatly appreciated. The engine is a 350 bored 40 over, stock pistons, mild cam 78cc chambered heads (from an old Chevelle), new edlebrock 650 carb with electric choke, and a performer high rise aluminum intake.