If the coolant is leaking at the bottom of the intake manifold(not the supercharger) then you need new lower intake manifold gaskets. You might as well buy a supercharger gasket and get that done too. Along with a gallon of coolant, 5 quart jug of oil, filter(because when you pull the lower manifold off, coolant will flow into your lifter valley then into the oil pan).
And it also depends on how much more you want to spend. Your taking quite a few things off the engine. So maybe a tune up at the same time?
Are you doing this yourself or taking it to a shop?
1997 Pontiac Bonneville SEi-SCRAPYARD
2000 Chevrolet Blazer LT 4X4 4.3L
2002 Chevrolet *-10 LS Ext Cab 4X4 5.7 V8