Just some advice while your doing exhaust, be sure the jack stands are supporting the suspension, as in the car is sitting under load just as if it were on all four tires, this reduces the chance of an exhaust leak, if the car is supported on the frame the body and suspension will tweak a bit after putting it back on the ground, which causes the pipe to adjust.
If you have power tools the main seal should take around 4 hours, if not you will be there for about 9! If you decide to do it, you should replace your throwout bearing, change your tranny fluid, oil, and clutch accessories which was mentioned before. Might as well put an aluminum driveshaft in too while your down there. Sorry i get carried away, now I see why it takes me so long to do a project, I am always thinking about what else I could do while I'm at it. Good luck regardless!!
