Rick-
Do yourself a favor and get the factory manual and electric wiring diagram for the Cressida. If you go to your local dealership(s) and ask REALLY nicely and offer to leave a deposit, the service manager MIGHT let you borrow them for your project. I work at a dealership here and sometimes we do that. We hardly ever see Cressidas come in, so I doubt they'd miss the books for a few weeks...
(NOTE: The service manual and electric wiring diagrams are in 2 different books. The service manual has SOME electrical wiring in a fold out section in the back, but the separate wiring diagram book shows the exact connector shape, pin location, etc. that really comes in handy when doing motor swaps)
Ryan