[njsteve]

The problem you describe is exactly what just occurred with a friend of mine's 1970 Challenger R/T 440. It turned out that there was a crack in the intake manifold on the valley side that was invisible to anyone outside the engine. When the car warmed up, it ran like crap. After swapping carbs multiple times, he finally pulled the engine and that's when they discovered the crack on the underside of the intake. It caused a major internal vacuum leak that sucked the oil from inside the lifter valley into the lower runners of the intake.

Before letting go of the car I'd swap intakes out and see if that fixes it.

Otherwise my 14 year old and I would be happy to rebuild that engine. [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]