I've searched this pretty good and so far not much on it.
Im considering the 545RFE tranny. Randy Bouchillon says it doesnt require too much modification to the x-member if you are good at fabbing and make your own mount. I have no problem fabbing my own stuff, but it would be even better if I could see what has been actually done to make these goodies fit?!
Pictures would be helpful if you got them! If not well I'll take as much info as I can get.
