I put a B16A JDM in my 92 si last weekend and the clutch relaease is like nothing I've encountered before. If I put the clutch all the way to the ground....I hear a noise and the gears go in real rough. If I take my foot off the floor (an inch or two) it shifts like butter. I though it could be the check cover plate rubbing against the flywheel but it looks fine. I'm at a loss otherwise. I bled the system and burped out any bubbles in the line. Any advise? A mechanic said it might be the clutch master cylinder (car is almost 20yrs old) Not sure if thats it because my LS swap never had trouble.