Recently acquired a '69 Z28 with the original engine. Considering running VP 110 octane or also have access to 100 octane aviation at my local airport. Any thoughts on this appreciated as well as changes I need to make to timing? I believe the car has been running on 93 pump Sunoco.
Unless your compression is very high, aka 12 to 1, pump gas is fine for your car. 'Most' gas stations (within reason) sell 100 octane right next to the 93 (or 91) here in the West. IF you need to adjust your timing, just drop it a couple of degrees and your off and running. Happy motoring as they say!