Converting an automatic 74 Swinger to a 4 speed

I have done it several times. I might be able to scare up one more nearly complete swap-over.
There can be hurdles but none are insurmountable. The biggest deal is putting the floor hump in, in the right place. ( I don't have one of those.)

But the real question is why?
With modern convertor technology and a rightly built engine, the automatic, gear for gear, will have the advantage in every aspect except perhaps point to point, hiway fuel-economy. And you can overcome that with a loc-up.
If a streeter
Don't say so you can row gears, cuz with 3.23s (even 3.55s and 3.73s), there is only one gear change at WOT from zero to 60mph; and at part throttle, just two, and the built auto downshifts faster in both cases, usually faster upshifts, and sometimes/often comes up with more torque.
But if you just want a 4-gear, there can no argument be made against wanting something,lol.