I think my 727 is fried. Now I'm at a crossroads...

The 727 is pretty tough. I say fix it and ride on.
That’s kinda the direction I’m leaning, mostly due to time and money limitations.

I pulled apart the 904 in the Scamp, and it was surprisingly easy.
Do the 4 spd, if it's in the plans anyway. As mentioned, crank drilled for the bushing(which it might be already).
That's if the 727 is toast.
Dads Ranchero did the exact same thing to me years ago. It was fine but freaked the fack outta me....
What needed up being the problem?