Sorry, I should have provided more specific info,
I'm still learning the peculiarities of these monsters:

1946,2 Ton,10 hole,4.75" ID early type,7.25" bolt circle.
Leaving it to be a 20x6 rim size? For use with 900x20 tubed bias rubber?
Am I wrong in thinking that the ring and pinion can be swapped, retaining all of my existing external hardware?
I was thinking if someone had upgraded to a newer 1 ton set-up, they could shell the 5.43 cluster out, and I could use it as replacement...
Otherwise I can just build the small block to spin comfortably at 7,500 RPM, and let her sing. smile