Hi
I finished swapping the 4 speed tranny to an O/D. I drive a lot of highway miles. I drove the freeway for the first time day before yesterday, I am so happy to have the 5th gear (so to speak) it was worth every penny. I would say do the swap. I can drive the freeway now and not keep one eye constantly in the rear view to see who is going to be the next person to run over me. I was passing others, what a concept!