My brother just bought an 87 GN from our uncle Bill Barlow. I'm hoping some of the Buick folk that have been around for a while might know more than we do. According to our uncle the car needs 140 octane (I didn't know it went that high, does it?). My brother wants to be able to drive it on the street so i'm thinking alky injection will need to be added. I have not seen it in person but my brother stated it has no o2 sensor or cat. Can these run correctly without the O2 sensor? The car is running an "experimental chip" from Turbo City but from what I've found online they don't deal with cars anymore, only bikes, so I'm wondering if one of the first thing will need to be replacing that with a chip that we can identify. Any and all help is appreciated. I'm sure I'm leaving stuff out, if so let me know.