About how much would it cost to hire a mechanic to change my pistons and or my piston bearings in my 1998 Pontiac Firebird 3.8L V6?????
there is more to it than that, first of all if you need pistons and bearings then more likely than not there will be excessive wear on the crankshaft, and also you are going that far, the heads should be rebuilt, because putting a new short block, with old worn out heads, invites more problems. Besides, it would be cheaper for you to buy a long block, and have it installed, than pull the motor and take it apart, add a few parts and put back together an undependable collection of old and new and worn parts. Personally I would put a later model 5.4 chevy small block engine, transmission with the wiring harness and computer. this will make a screaming quick firebird, with about the same fuel mileage.