64 3 sp to 77 4/OD Installation

Wow, gotta be the longest post ever^^^^. You must be retired. I'll have to print and read it on my day off. :-)

So I have a 64 Val vert, rebuilt 225 head shaved 0.08, Oregon regrind cam, pretty mild, can't remember the specs right now but I think it's about. 430 lift and maybe 252*, pocket ported, gasket matched, hogged out stock exhaust manifold and soon to have full 2.25 exhaust, stock Carter BBS. 3.23 rear with 3 speed 64 tranny. Static timing is about 8-9*.

First time I took the car out after getting it running I accidentally peeled out a couple times from traffic lights. First is pretty steep at 3.09 X 3.23. I'd like to lower the freeway revs but I haven't installed the mini tach yet. It's going to be a driver.

So AJ, my first change is going to be a 65 trunnion mount 4 speed from a 65 cuda (still 3.09 first gear and 3.23 rear) then I'd eventually like to try the 70s OD I have waiting in the wings. What do you think is the better combo for all around driveability ? I have my ideas but curious what you think.