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

No idea at all, this was 35 years ago. Told Dad about it and topped up the fluid, BUT if I remember correctly it was puking out the dip stick.
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.

What needed up being the problem?