Rwd and red top would be absolutely trivial as you can buy an off the shelf adaptor bell housing to fit the redtop onto a cossie t5 gearbox.

4wd would be less trivial as no such equivalent available for the cossie 4wd gearbox

Way to do it really would be to make a skyline box fit, SO much better in the first place than a cossie box and not really any dearer to buy, so if you were converting something it may as well be that instead.