Having looked at them all the NV 4500 seems the perfect choice!

Techinspector, some great choices but prob a bit overkill on the ratings and price for my application, and the Muncie 465's ratios arent great for my application. as i'll have a low ratio option, i dont really need a granny gear, and the ratios are a bit low.

the nv 4500 looks great, its got great ratios, and easily mates to a transfer case. would it be worth trying to source an old chevy/dodge as a gearbox donor over here in england then recondition, or is it worth just buying new as theyre so chep?

cheers everybody for your help so far
lobster