In reply to the radiator, I have no plans to use the stock radiator with a v8/auto trans. I am trying to find someone who has found another option other than using a aftermarker desert cooler.
As for the 78 subframe I have no plans to drop it further. The ride height will be about 4" lower than stock the way I have set it up. I can change out to 76-81 T/A spindles if I want to go to bigger (11") rotors. That has not been finalized as yet. Thanks for the comments.