You can use your old injectors, but you'll need to take em to a shop to have the pop pressure raised. The inline pumps run at a higher pressure, and actually burns a little cleaner. You could even have them find a little bigger tips for them, for an even bigger power jump
. Having the intercooler is a great idea, but if you first do a few miles with it and note the EGT, you'll get a better idea. It's definately going to be borderline in the summer with the fuel turned up.