first this is what i have done

Magic Stick V.4 239/242, .649"/.609" Camshaft
1-3/4 long tube headers
heads have been port and polished
cromemoly push rods
underdrive crankshaft pully
k&n
dyno tune to make 450 rwhp

im going to have a TNT wet nitrous system install
should i upgrade the fuel system ?

 

without a doubt, go ahead and get yourself a racetronix kit if you plan on spraying it soon

 

Oh yeah! With that much power you need a pump if you plan on spraying ANYTHING. And some injectors if you plan on going dry.