Originally posted by OhSigmaChi:
Thanks for all the info guys. OK, now I'm starting to get somewhere. So, brad, how do you differentiate between top/side feed injectors? Is it the orientation of the injector to the manifold, fuel rail, or something else intirely? I was eyeballing 32lb mustang injectors for either a high CR or a turbo build-up. I am still trying to figure out which option offers the best
hp/$ ratio. 
The side feed have the fuel rail down on the side with the electrical connector near the top. The top feed style have the electrical connector near the top with the fuel rail directly on the top. There are several different styles of electrical connector, even just for one "style" of injector. Your best bet is to take one of yours out and take a picture of it to compare to what you find on ebay/etc. Then you'll know for sure.
My best guess??? The Mustang ones *should* work fine providing you make all of the calibration changes.
