Cody, I have an 87 Sunliner with a PCM 4140 setup, which is a Mitsubishi 4 cylinder, Velvet Drive 1500 trans, and a PSL20 Pleasurecraft outdrive. I'm in exactly the same boat (pardon the pun) as you. I just pulled the outdrive out of mine, and can tell you how to do yours.
If you've already...