proper fuel (0ctane) Forum Engine

[Ellis]

Finally got my 69 Chevelle Running great, car has 350 eng mild cam . vortect heads msd ignition, di I need to run 91 octane or is 87 ok car is a cruiser.
Thanks Ellis:confused18:

[AMSOILGUY]

What compression? That's what I would base it off. More then likely the 91 I would think.