Hmm converting to obd-1 is more work/money than I expected. I think for now I will just stick to my original plan and then later when I can afford the obd-1 conversion, I'll do it to compare the two.

In California, our highest octane is 91. Although I've heard 92 octane has been around gas stations with race tracks near them.
I'll probably just run 91 octane, it'll cost more than 87 octame but I'll be getting the same gas mileage, I hope.