New build hp numbers?

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

You'll be able to extend the RPM of the motor with a good solid flat tappet cam. You'll have a better idle quality and more torque throughout the range as well. At least have a chat with one of the guys on the forum who spec cams for people.

95-97 octane will be required. Probably best to run it on 100 octane gas or E85.

Power should be close to 625 hp at 6000 and 580 tq at 5000. Not really going to start making power until 3000, so you'd better have some stall and gear in it.

info

Motor was originaly built with a Scotty J Soild lifter cam, We are backing down on the cam to help with the maintance. 3800 on the conveter with a 4.57 gear. I was thinking the same thing with the fuel mix as that's what I do with our 13.1 408w motor.
Thanks,
Steve