Yup, it's a pretty big pain, actually. I changed mine on my 92. Had to remove the crossmember and disconnect the downpipe from the manifold end, but I didn't bother taking it all the way off. I also took off the shift cable cover and flywheel shield to make a little more room. Personally, I would not use any additional sealer with the gasket. Frankly I find the design for the mating surfaces to be rather poor, and anything on them (eg sealer) just lets the gasket slip/squeeze out when you go to torque down the bolts. I used sealer once and ended up pulling it apart again to redo without it.