Wasn't aware my car had a MAF sensor, I didn't see one under the hood - I believe it's a MAP/IAT setup, but I could be wrong.

Will definitely clean the TB and I may have to swap out intake manifolds, the new engine is from a different model car (but still a 3800 series II)

Anyone else have tips/advice on what should be replaced? Other parts outside of the engine are included in my question - should I do anything to the brakes, power steering, are there upgrades that should be done to the trans, maybe replacing bushings or hard to reach parts? Thanks again.