starting a turbo build and still doing some research, but wanted to lay down what i am thinking about so far and get opinions. This is going in a '96 chevy 1500 extended cab, and im looking for somewhere in the neighborhood of 500-550 RWHP (I would like to get into the mid 12s). This truck is going to get driven a lot and will only see the track maybe once or twice a year.

2004 LQ4 6.0 DBW
trick performance hot side manifolds
on3 76mm turbo
siemens 60# injectors
4l80e with stock converter for now
stock cam

Just looking for opinions on whether or not the above setup should meet the goals of the build. Not sure what size intercooler i am going to run. Are new valve springs going to be necessary, and if so which do you recommend?