Cool swap, great pictures!
Use a 3/8" pipe to AN-6 adapters at radiator cooler and 5/16" pipe to AN-6 adapters at the trans. Run AN-6 soft lines (appropriate for trans use) to the frame rail, and then AN-6 hardlines along the frame rail.
If you're not familiar with AN - AN just means 1/16" inch, i.e. AN-
6 =
6/16" = 3/8"
Here's a little demo on how to make pipe-to-AN connections if you haven't done it before.
http://67-72chevytrucks.com/vboard/s...5&postcount=28
Just a thought