GM OD tranny fit?

Only if you read it that way.....

What would you call it, slick?

The OP's post asked about the GM tranny. He even stated that he was gonna get hate mail from others which you provided.

So what's with the "sounds like GM people" comment?
Or the comment about putting an LS motor in?

How many 518 swaps have you done? How are you keeping the driveline angles correct if you are simply dropping the tailshaft for minimal mods?
How are you controling the trans? Aren't you still modifying the driveshaft?

Just saying it sounds like the blind comments I see over on Moparts from their "expert" tools......