89 360 engine

I know I’m getting old when:

(Sorry OP- not trying to derail here)

$200 for a used engine back in the 80’s was a running, drivable drop in with 50k on the clock. We forget that they now are 40 years old and have now been thru like 2-3 owners.
For $200 I would take the risk (like buying 200@ $1.00 lottery ticks) but be prepared for even the best engine to possibly have issues. $200 is just a price for admission to the cheap seats, but every ride cost money.

it may be as easy as a car oil pan and gaskets (fingers crossed) or major surgery.
I wish you well and good luck! Keep us posted.
Syleng1