Is the 90 clutch an upgrade from the earlier years? I'm looking for a clutch that will hold around 170hp and 120lb-ft. Not for dragracing. I'm thinking exedy street and a chromoly flywheel (12lbs). Good choice/bad choice?

 

yes the 90-91 clutch is bigger than the 89, for it to work in your 89 tranny you need the 90-91 flywheel as well...

88 is a different story if anyone is going to ask...

 

the 90 on up clutches are cheaper also.

 

the 92-95 are even better-same rule applies about teh flywheel

 

So as long as I get the appropriate flywheel there isn't any kind of modification needed inside the transmission?

 

nope no tranny changes. Just get a 90+ flywheel and a 90+ clutch/pressure plate. Everything goes together