Post by
biggie »
https://forums.nicoclub.com/biggie-u182.html
Wed Dec 22, 2004 6:00 am
The only thing is they have different pilot bushings. You'll need to take the one out of the auto engine and put a regular manual pilot bushing in. Otherwise, its the same.
Edit: and of course the flywheels are different too.
Final Edit:Just realized you are dealing with 2 different engines. '90 (SOHC) and '91 (DOHC). If you put the '90 into the '91 you would also have to change the powersteering, wiring harness, etc. This would be a lot of trouble. I'd recommend finding a used DOHC engine, no more than a couple hundred bucks.
Good luck.