np205 TC question

[69GWC]

Was wondering if i pulled my Rockwell out how hard is it to install a 205 in place of it.
Will i need a new TC mount and will my drive shafts still work?

I have a vibration in the drive line and am having trouble finding it, only under heavy throttle is it doing this under normal throttle load it feels fine but does feel like it might be getting worse, I feel like its coming from the TC and the TC gets pretty dang hot after a drive to town and back.

I found a 86 3/4 ton with a 400/205 and a older one with the 465 4sd and 205 that I could get the TC and tranny but did not think the drive shafts would swap over.
I can part one of these trucks down and use most of all of it and want the 454 out of it for my Nova.
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