distributor

I have a 98 gmc yukon with a 5.7 350. upon doing work on my vehicle i lost the original screws that fit the distributor cap to the distributor and replaced with some others that fit. The other screws actually bored through the distributor holes and now the cap just sits losely on the distributor. I have another ditsributor but have a few questions. How do you know if a distributor has been modified or not? If anything, what can i do to make it work for me? I know that their is a kind of sensor or whatever it's called screwed to the distributor, can this just be changed out. Any info is greatly appreciated. Thanks

never heard of modified dist. as far as the new dist, dont understand why it wouldnt work or why you would need to change out anything on it. is it from a diff vehicle? you may want to get some help installing new dist, they can be a lil tricky

btw those screws strip out oh so easy