1. Transmission & Driveline
    Hello my name is Mark and this is my first post here. I recently aquired a 61 bubbletop that now has a ZZ383 with GM rated 450HP backed by a muncie 4 speed. I am looking to make this a more highway friendly driver and had a question. I am looking to change to either a 700R4 or a 4L80E overdrive...