If you have a 76-79 bell housing on your 304, the ford trans (NP435 probably) should bolt right up to it but, you will need a adapter kit for your transfer case which will have a new main shaft you will need to install in the transmission. You should be able to use your jeeps clutch disc, pressure plate, clutch linkage, but will need a different pilot bushing. Novaks website should have all kinds of info on this swap, its a popular one.