Stroke that chevy out to a 383, if you want fuel injection find a tpi set up on ebay... the long intake runners are great for low down torque, custom chip it, etc......
That's not instead of doing gears.... I just wanted to point out that you should do that with the 350 you are building... LOL
see if you can find some chevy cucv full size axles. Already geared to 4.56 and a locker in the 14 bolt. They are getting harder and harder to find though, but food for thought.
And then let me know what you want for the 2f.... I need it to build a 2fe project.