I just got a d15b obd-1 longblock from a fello ht member and it comes with a flywheel and clutch already mounted on. My question is do I have to replace the clutch with a clutch for a crx or can I just buy a throw off bearing and slap my si cable trans on.

The right thing to do is replace the clutch but Im low on funds and this clutch has low miles

 

If you have an '88 transmission you'll need to replace the clutch, '89 - '91 transmission will work fine though, you'll just need a cable throwout bearing.