Gto oil pan will fit the steering and chassis. I'm wondering about tranny and crossmember/ floor mods. Thinking bout a turbo 350 tranny due to being smaller diameter and shorter.
69340dart used a TH350 in his 5.3L 69 Dart build. He reported that "done all of it without too much custom work or mods to the body or structure of the car." 1969 Dart Chevy 5.3l LSX