you can do most of this work at home, but purchase a manual and a few handy tools and you'll save 100's of $$.
fuel pump seal is simple: but u gotta drain the tank first, theres a few threads on replacing the pump, use them to get to ur pump seal. part=$10 max id say
manifold o rings: again rip the 6-8 manifold top plate bolts off, then remove the 4-6 bolts inside the plenum chamber then replace the o rings. part=$10-20 max
rocker cover gasket: remove the bolts around the rocker cover, then change gasket and retorque bolts. ( the rocker cover gaskets are reuseable but if you think its suspect change. part=$20-30 from memory
power steering pump: what replace the whole pump or ?? id say, remove belt, undo hoses, then undo bolts holding pump, replace.. part=$50-100
rear shocks: undo top bolts, jack car up, undo bottom bolts, replace.. parts=$80-200 pending brand and type of performance shocks
front shocks: there is a how-to on this forum. parts=$200-1000 again pending brand and what u want them to do, adjustable n stuff.