He’s got power brakes. So need vacuum to run them.
Just get the compression to handle the 91 octane with a streetable cam. Tricking the motor to get by with more compression gives him a cam that will be harder to tune.
@cpearce I’m sure the setups you and your friend use work well for you guys with your experience and knowledge. But reading the O.P.’s posts, he’s a beginner to carb tuning and other advanced adjustments.
I think keeping things simple will go a long way. Someone mentioned a Edelbrock AVS carb. I can see that now being a better fit for the owner.
@Psychobob22 have you ever adjusted mechanical valves before? If not have you watched someone else do it?
Do you own a timing light and other tuning tools?
Why not get get the right compression
