Can anyone name off any Ford 6 Speed Manual Transmissions that can handle a good amount of horsepower and have the capabilities of having a transfer case bolted to the back of them?

I was thinking that the Tremec 6 Speed,(T56 I believe),would work,but I didn't know if you could bolt on a transfer case or not.What I'm looking for is something that can stand behind a healthy big block,somewhere around 500-600 horsepower.I know it sounds crazy,but I need something.This is going to go in a F-350 which will be used for towing applications.I have found a site that sells the bellhousings to bolt the Tremecs to the Big Block Ford's.5 Speed's would work also,but I'd rather have a 6 .I was also thinking of a 4 Speed Toploader.I know that they'll handle the power.Can you hook a transfer case to those?

Thanks In Advance!!

Nightrain