Early 904 rebuild

My 68 Barracuda has a 4-gear, and it certainly is a hoot to drive.
Do you already have a hi-stall? ....................If yes then read no further.
But if no, then
here's a thought;
The short version is this; a Hi-stalled TorqueFlite with a loc-up behaves like 5speed auto. Explanation to follow, in the long version,lol.

To continue;
Consider; A999/2.94s/ and a 2800TC. This will get you;
vastly better performance in first gear than just a swap to a 4speed,and
second gear will be close to the same as your current second gear,and
9% lower hiway rpms, and so
equal to a 4+1=5
Yes,on the street, you can get 4-speed performance with an automatic, actually better than; in every way.