I was going to swap a sm465 in place of my th400 in my diesel blazer. I have almost everything for the swap but now I'm thinking of doing a nv4500 instead. Is the 4500 as stout as the 465? I'm sure I can find a good used 4500 for the $500-1000 range which is fine for me. I want to keep mech. linkage I have and np208. Would this be the same doing the 465 swap or just too much trouble? Thanks.