Change timing to run 91 octane with 12:1?

67autocross said

How did the car run on the AV gas? I'm thinking of running my 10:1 340 on it...the pump gas here seems to get worse every year.

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FWIW, I run my 10.7 -360 on 87E10(aluminum heads). Always have . 223/230/110 cam, or 230/237/110, same results.With iron heads, and 10.0,you should be good on 89/91, depending how SMALL your cam is.Feel free tp PM me.