If you are getting the injectors, get new top o-rings. they are 5/16" inner 7/16" outer diameter. Chances are you will need some, and for probably 30 cents each, its just as well to pick some up. I barely squat a couple of mine when I put them in, gas went everywhere, then the next day my starting motor went, maybe it was coincidental, but id say gas pouring all over it didn't help it any... GLWS