Well, if you want to boost 12 pounds you'll need new rod bearings, rod bolts, rods, and might as well get some new pistons while your at it. Head studs would help a great deal as well. It's a different story if you want to boost 6-8.

As for the rest of the shit you'll need bigger injectors, an adjustable fuel pressure regulator is nice to have, adjustable cam gears, maybe a walbro fuel pump, chip your ecu and have it tuned unless your using the AEM or Greddy box.