How much power was it worth?

I agree I made the motor more efficient, put a better port matched M1 on this motor, filled the block half way, put 2 bolt billet steel main caps, and put ARP main studs. It had milidon bolts holding the caps on when I bought it. This whole thing started because a valve guide was too tight and the valve hit the piston after it grabbed. I bought the motor at that point cheap only to find the bolt that has to be drilled to install the milidon gear drive had fallen out and made its way into the oil pan and beat up the rods, pistons and sent shavings into the bearings. This motor had run 10.40's in a 3400 LBS dart street car.