Thought I would take a minute to post an update on my problem. It wasn't a vac. leak. It was/is a fuel problem. It is lean, but it is because it isn't getting enough fuel. I put a new Fram fuel filter on prior to installing the new engine. After exhausting all of the possible vac. problems, I switched my focus to fuel. I bought a new Wix filter and installed it. About 80% of my problem immediately went away. Still a little off on power when it is cold, but runs. I cut the Fram filter apart and it was completely clean, just a bad filter. I'm not a Fram fan!
The balance of my problem, I believe, is fuel pressure. I'm only getting about 8 lbs. at idle, I'd like to get that up to about 12 -13 lbs. (read somewhere that was the target pressure). Any ideas other than changing to an adjustable regulator. I'm wondering if a stiffer spring or shimming the existing regulator would be options???