Manifold washers
The passenger side was scratch-the-paint tight, about the thickness of the exhaust gasket clearance!
While extrapolating my desired clearance I felt .250 was needed at that time but now see .200 would be fine. I shortened my steering column tube & added a bearing at tube end and have about 3/8 clearance there. The steering coupler is a given, has to go. Probably about 3/8" clearance to steering box now w/shim under mount with no modifications to gear box.
Whilst jostling motor about I was cognizant of limitations of motor movement/placement due to fan interference with fan shroud and AC compressor to hood.
I recommend new motor mounts and center motor to desired position before taking manifold measurements, in retrospect...
Please feel free to question anytime!