408 on dyno, what will it make?

0823171625.jpg Results are in IMMs' Brian Halfegers' estimate of 470 to 490 Hp was a bit conservative because he didn't do the heads. He did however pick out and supply the basic combo, and give me a baseline for tuning. They were done locally in Minnesota by Brian Hansen at R&R performance in Spring Lake Park Minnesota. Brian at R&R did a fine job on the block machine work and bowl porting the heads after installing 2.02 valves. So a big thanks to both Brians!
The numbers!
504 hp at 5700 and 5800 rpm! Torque peaked at 518 ft lbs at 4600 rpm.