Yes, the 533, 633, and 733 all use the same engine. The differences will be due to the auto/manual transmission option. You will need to retain the flywheel of your present engine and possibly the throttle linkage bracket. I made a switch in the other direction. I used an engine from an auto in my 5-speed. Just keep all of your parts until you have everything running and you should be fine. The computer, wiring, etc are all retained from your present configuration and switching the engines should go smoothly.