a)Put better heads on it
b)Do a leakdown test, and pull your valve covers and a couple springs and see what shape your seals are in. If the seals are shot, the valve guides are probably shot too.
c)Mr. Gasket and Moroso have electric water pump kits, Merzie has a better kit for serpentine application.
d)My preference is no mufflers.
1989 Firebird L03
1993 Thunderbird 5.0 HO
1995 F150
Gonna be building a 351 Boss this summer!
Summer's over, never got to it...
This is my current build though
http://www.302w.com/Forums/forums/thread/1100.aspx