Passon or Tremec TKO 5 speed gear box consideration.

I know a guy who put the passon in his car and he said it was a work of art and the single best thing he did to the car, a 400 big block stroker build in an E body.

That said, like others say the cost is apparently Big $. And maybe getting one is the biggest problems. Even if he was to get you one what if it needed service or warranty or whatever... Might be better off with a tremec offering?