If you have a 96, (auto trans. ? truck) they are reman injectors identical to the ones in your truck. Replacement will not net anymore power, unless your current injectors are bad, malfunctioning etc.
You can add a TST, PDR, etc. torq. /cam/fueling plate and afc spring kit installed for $400-$500, for more power with your injectors (stock engine?). These would allow you to add 50-70 hp. (without expensive turbo, exhaust mods etc. ) which is pretty cheap bang for your buck!
If you are seeking hp through injectors, look at the 215 (adds 30-40 hp. ), 370's (add about 45-65 hp) or diesel dynamic lines (50 hp up to extreme hp levels) or DonM's ,EDM injectors (pricey but state of the art and make serious ponies).
Hope this helps.