Nice build. It's good to see a little compression being used. The limiting factor in this build is not the headers, but rather the cam. The headers are good to around 675-700 hp, and you'll not be getting that much with that cam. Do not be concerned about it. Having a broad torque range, which you'll have, is far more important than a peak hp number.
IMHO, I would throw in about 3-5 gallons of race gas in with each fill-up. It may/may not run fine on 93 octane, but it's better to have some cushion for the unexpected lugging, or running hot after doing 140 mph for 10 minutes.
Hope that helps,
Dave
IMHO, I would throw in about 3-5 gallons of race gas in with each fill-up. It may/may not run fine on 93 octane, but it's better to have some cushion for the unexpected lugging, or running hot after doing 140 mph for 10 minutes.
Hope that helps,
Dave