1990 subuurban 4x4 T-400 to 700r4 swap
I have opportunity to buy 700r4 from 4x2 Chevy Blazer. (I am not in US so it is rare chance)
What I need to swap th400 in my 1990 4x4 suburban with 700r4?
I want to change it to get overdrive and better mpg.
Is there any sense in this swap?