Sorry Jody.. but chips are a complete waste of money on this vintage truck, the only thing they can do is advance the timing and you can do that for free by simply turning the distributor.

If you got your engine rebuilt to '88 spec and you still have the stock exhaust on it that is your problem, the exhaust is a cork but even worst the stock cam is rediculously small and severly limits engine output. The solution is to install a better cam(Comp Cams 31-255-5) and replace as much of the stock exhaust as you can get away with, there are CARB legal headers and replacement Y pipes available for these trucks, check out Summitracing for your options. You can use a non california EEC in this truck, there are many different calibration codes but overall there's not enough difference in any of them that you would be able to tell from the drivers seat. I'd suggest you source a used or parts store replacement for your EEC instead of having it "rebuilt".. likely to be cheaper and quicker.