Hello gents new user here. I bought a 72 nova show car that has a built 406 in it. It's been running great for 6 months and now I'm having problems with the engine and can't seem to find the problem. It runs great until it gets up to temp (180*) and then it dies, like someone has turned the key off. When I try to restart it it fires once in awhile but will not start or stay running.
I have the following ignition : MSD 6AL series box, MSD Blaster Coil, with a Mallory Dist. No points or vacuum advance.

The Fuel System : Elec. fuel pump and Elderbrock 650 carb.

I run the car up to temp and when it fails I check the spark at the plugs and it looks to be fine. The fuel pressure gauge at the carb shows a steady 6lbs of pressure. I take the breather off looked down into the carb and cracked the throttle and I saw fuel spray in. I moved the wiring around from the dist and 6al box while it was still running trying to find a bad connection or short, but no luck. I'm at a lost on what to look for now ?? Any Help or suggestions would be great.