Spring slider mounting

I'm running SS springs, as far as I know A bodies from factory use a 7/8 bushing. I don't know about some of the other after market spring companies. Mine have the aluminum bushing that goes into the spring eye, then another spacer that extends past the slot so the roller bearing ID slides over it and then the thru bolt. There are also two large washers that go between the slider frame and the spring eye. I don't know about using the stock bushings. They may flex too much and be too thick to allow the slider to operate properly, but I'm not positive on that. So not much help. What brand of slider do you have? Because I believe most are set up for the B and E bodies which use a 1" bushing.