Just a heads up- sometime in the late '70s they also moved the thermostat housing over to the driver's side to help with clearance on the new compressor, as opposed to the more centrally located one on earlier manifolds which interferes with the later brackets and compressor.
Newer manifold (I know it's a 4bbl., but you get the idea):
View attachment 1715890686
Old manifold:
View attachment 1715890687
One thing you might consider; keep your TBI manifold (you know everything fits) and use a 2 bbl. to TBI flat plate adapter to mount the carb. There's some out there, or it wouldn't be too hard to fab one up, either.
View attachment 1715890688
