Well,
Being you are in the Peep Holes republic of Caulifornia which has been over run by smog nazis which I live in . Make sure you have the factory y pipe and cats and all smog equipment for that year mo tar, figure 100.00 for new high pressure fuel pump, 130.00 for corvette fuel filter , high pressure hose and misc. fittings, 40.00 for tack adapter, 85.00 for speedo converter, 30.00 for water temp sender, 30.00 for oil sender if you didn't rob it off the old motor , 25.00 for wiring diagram , 150.00 for cold --very cold beer if you plan on doing it in the summer to keep you calm and collective while doing chevy surgery .So any savings on these figures I would add to the beer figure, or if your into wine a good old vine zinfandel! LOL.
91 Silverado 2005 5.3 ,transgo hd2, Yank2600, Nelson Tune, 3" exhaust, 4-6 drop
2004 Silverado crewcab 5.3 3'' Magnaflow exhaust