I don't know much about 4x4's. I just recently bought a 76 K/5 Blazer. It is all factory original. It's got the 400/400 combo. What transfer case would it have ??? It's full time 4 wheel drive. Also, what all would be involved in converting it to part time. Right now I've got (high, high-lock, low, low-lock). Would you recomened this conversion ??? This is my daily driver that see's alot of street and highway use. I do plan on off roading with it.