1990 APV steam engine?

OK, I think I cracked somethin'. Huge volumes of steam comin' out the exhaust. Goes through coolant in about 3 minutes. I need an engine and instructions on how to get the @%$^# thing out. TBI engine VERY hard to find...how tough is it to install newer front harness and computer for 3.1 Multi-Port to update?

Bet ya blew the head gasket. Just find any 3.1 engine (FWD) and swap over your top end. (RWD 3.1s dont have the same motor mount locations. They dont even have the casts in the block for the fwd mounting brackets.)