I have the original block out my 85 ttype which is a 20 bolt pan
I would pull it apart and sell the block . it is currently a built shortblock ..I havent even bolted heads on it yet
it is fresh bored and torque plate honed to 31 over for use with trw forged pistons block deck have been surfaced and it has new cam bearings installed
I will pull it apart and sell the block for $400 plus shipping
if you price the machine work you'll find thats a good buy
it is drilled for 86-87 turbo drain but a simple pipe plug in the hole would fix that