Well add this to the what it’s worth column but for my 78, even though it is a 4 speed, they do make the gear vendors OD for it, thankfully. Heavily considering it or possibly doing an Nv4500 swap for the same reason. 1:1 and 4.56 gears currently.For the what it’s worth column I have witnessed with my own beady eyes and drove in and alongside a couple of folks running the OD setup including @Frodee They all liked the result. Only gripe is the reverse protocol. I am about to pull out my spooled 433s and am giving serious thought to doing the same.
My dart though, the t56 mag swap was far far cheaper.