87-88 13bt vs 89-91 13bt in a 87 TII
 

What would i need to change on my 87 TII to be able to put a 89+ 13bt into an 87? new computer? sensors? or would it be easier to just put a 87-88 13bt back? What else for a 13btt cosmo? same (sensors, computer)
I'm gonna stay away from the 13b-rew i think...

stick with the 87-88, much, much easier.

I am trying to get the 89-91 engine for my car and doing that swap, right now it seems most places are out of jspecs though. I plan on using just the bare block out of the 89 and using all the old manifolds and sensors from the 87. I'll probably just use premix too, so I am not worried about which front cover to use. I wont have much emmissions equipment on it either.
Its not gonna be much fun, but it is possible.