1968-73-87-98 questions

[jpmanyhearts]

I have a 1998 chevy 5.7 350 with a nv4500 tranny and I want to mount it in the 1968 I have the little bit of research ive done tells me that unless im going to put ifs in front the transfercase wont work 1 because its on the passengers side and 2 because of the ifs.........so I know less than nothing about the 73-87 chevy trucks but maby since its was late in the years of those did they have nv4500's if so I could use the transfer case from those years and it would be on the correct side ???? anyway thanks for all the help