It's not a mustang, but a fox bodied car. I've got a 1985 TurboCoupe thunderbird that had a minor engine bay fire. I've dicided that i'm going too put my 429 CobraJet big block in it. I was wondering how well a freshly rebuilt World Class T5 would hold up behind it? The motors a mildly built motor. I want too have Overdrive in it if i can. I'd consider an auto ij it, but what Overdrive trans are ther3e for a big block? Thanks for any info.