I figured roughly around 300 horses and 400 ft./lbs. Most likely the motor is an L48 because it has pink rods. Heads have been ported, cylinders have been bored over .060", keith black flat top hypereutectic pistons rated at about 10.1:1, I have an Edelbrock Performer intake with a Rochester quadrajet on top, I have cheap Summit headers going into straight pipes. I'll probably get two mufflers to put on next month. I also have a Comp Cams XE256H cam to put in. So did I figure about right on the power? I know there's no sure way to tell without a dyno.

 

I think your cam is too mild for 10:1, unless you live in Denver or someplace else that's high elevation you'll probably need octane booster and premium gas every time, but you should find your power goals. This would be a good combo if you had 3.08:1 gearing.