To rebuild bottom end in your case:
bore/hone to the spec for your pistons
new main and rod bearings along with thrust washers
new seals and gaskets
I'd also upgrade to a type r oil pump depending on what year ls you have (96+ ls is a type r pump I believe, have to check)
many people or any machine shop can tapp your oil pan.
One of your intake manifold vacuum lines can be teed into for the wastegate. Vacuum hose is cheap, buy 10 feet of it and it will be more than you'll ever need.
Engine assembly lube for bearings and such and moly lube for cams both can be found at NAPA or the like.
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Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.