Overdrive Transmission for 630 HP motor

I drove Mike Musto's B-Body with a 727 and a Gear Vendors for a couple days while tuning it. I found that the small amount of overdrive it provides, helps, but it's not quite enough to warrant the expense.
Just out of curiosity as I'm doing a 4L60 install as we speak...how far from the floor to the center of the trans output shaft did you end up at...I know this has nothing to do with the drive line angles..tanks