You're welcome, thanks for following along.

Here's the crossmember from the 470, it needs to fit here where it is snug because the frame is tapered (narrower at the fornt) and the uprights on the crossmember allow for that taper.
https://picasaweb.google.com/lh/photo/3sJQmJvJ9ZaxJPu906LmOdMTjNZETYmyPJy0liipFm0?feat=directlink
and from the top
https://picasaweb.google.com/lh/photo/0bPQ8Z-cweQFFpGn6y2709MTjNZETYmyPJy0liipFm0?feat=directlink
As you can see it's a lot deeper than necessary and or the other brackets on the frame don't allow it to be slid up as high as I want. My solution is to snip off about 4.5" of the uprights and drill new mounting holes.
https://picasaweb.google.com/lh/photo/E9hrCSNFAEUNep390OhCj9MTjNZETYmyPJy0liipFm0?feat=directlink

Tonight I'll get the holes drilled in the frame, bolt it in place and then remove the original transmission crossmember. If the flywheel housing weren't so large the original one would be OK, but to set the engine high enough to clear the existing crossmember would require lots of floor work to clear the transmission. Additionally one mounting ear on the flywheel housing for the starter needs to fit inside the frame or be way above the frame. So that sort of sets how high the rear of the engine can be in the frame.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-