Let me also add that I highly recommend that you transplant the motor into a like series vehicle. Most of my issues have stemmed from my fitting a '94 motor (let's call that series 2) into a '91 trooper (Series 1). If I had only used a '92 or later trooper, I could have used the motor mounts that came with the motor, the stock transmission crosmember mounting point, radiator that came with the motor, etc.

You'll save yourself a lot of headaches matching the two.

I've considered hauling my trooper to the junk yard and starting over with a '92, but I'm too far in to go back in my mind. hind sight...

Hope that helps.

Paul