T56 swap is easy as long as you get the kit like I did from D&D. I wish I had gotten the viper spec or one with more of an overdrive, but I'll upgrade if this one ever goes. Some people say they have to tweak the tanny tunnel to make it fit, I didn't mine fit no problemo.
Correct on the steeda wing,haha im selling it and putting the gt back on doesnt go good with the gt ground effects. I bought the trans and kit out of my buddys fox body,D&d is nice but to expensive,just used a mount from an automatic 4 cylinder fox and custom made the other mount,shortened the ds and slipped the cross member in place an inch back.