T-56 Transmission Install Thread

Would it be possible to get some overall dimensions of the trans (or at least from the front of the bellhousing to the tail shaft)? I keep thinking about swapping to an overdrive setup, but seeing as I just dropped a fair chunk of money on a custom aluminum driveshaft and new yokes front and rear I'm curious what all I'll have to change. Is the output shaft common to any other Mopar trans?