Sorry for the lack of details [bonk]
The Northstars stripped down and tuned for offroad applications usually make about 370hp/tq and the Ford will make about 330hp and 350lb' of torque. I'll more than likely go forced induction after the first season (work out all the kinks in the computer first) and max will probably 500hp/tq.
Length of the trans isnt a big issue as its going in to a tube chassis rear engine "sand rail" (see pic). Car will primarily be used in the sand with some occasional trips to the desert.
The 4.60 R&P would work just fine but the gearstacks will probably need some work which isnt a big issue (these trannies are a lot cheaper and stronger than the purpose built units we typically use). Was your trans regeared or did they come from the factory with 2 overdrives? The lower its geared the better for my application as I only need a top speed of around 110-120 (more than I'll use I imagine).
The car pictured isnt mine but is the same model and manufacturer (our cars has a lot more tubing for strength/safety). Weight will be around 2100lbs, rear tires are Extreme 14.50 (width) and are 33 inches tall so that will effect the final gearing as well.
