Hi,
I have a high performance 454 engine and ever since i moved up to my 4000ft altitude ive had a problem with getting gas in my oil pan. I messed with the carb a bit and still had the problem and ended up switching to a 750 holley 4150 hp.After that i still had the same problem.

I then sent it in to a shop to make sure that all was right on it, and still have the same problem. When i was at sea level, i never had the problem.

Is there any other thing that could really be causing this? I have a post in shop talk about my vaccum advance, but right now i just have the vacuum canister plugged but debating to put a lock out kit on it or not becuase i dont have enough vacuum to use the vacuum advance.

thanx
david