at some point in '86 they changed the oil pan seal type, I had to deal with filling in the hole because of the trough in the rear crank bearing cap, that's the only thing I had to do leak wise.
start
HERE, that's the thread I made over on those forums, and is where I got my info...
put the ranger engine harness on the turbo engine one piece at a time, the things you will have to repin are those dealing with the TPS sensor and IAC, pull the IAC valve from the '89 engine or you will have to wire in the diode from the '86 engine harness, the newer IAC's have the diode in the components so the one in the wiring isn't necessary (unless someone says I'm wrong, which would explain some things). you will have to add in the vain air flow meter, and the boost control solenoid, along with a couple temperature sensors. although it's tempting, you need the barometric sensor from the donor car, the map sensor from the '89 isn't the same piece... (it's recessed into the top of the firewall above the blower housing on the passenger side). I isolated the wires I had to add to the harness, pulled the harness grommet through the firewall then slit it and put the wires in that to get them to the computer. using the ranger wires makes for a cleaner install as nearly all of the harness from donor engine would have had to been spliced, they changed connectors between those years...
oh, your fuel lines most likely aren't going to match between the donor engine and the ranger, what I did was get about 8 feet of both 3/8" and 5/16" high pressure fuel line and 4 hose clamps to fit over them, I put the respective fuel lines on the rail over the bumps that the quick releases would normally clip onto and placed the clamp there, routed the fuel lines over the brake booster (straightest line) and down to the fuel filter where I did the same thing on the fuel filter and the return line.