Thanks Dave. Yeah I forgot it was a 557 when I asked about the CR. I'm too used to small 460 sized engines.CC on the head was 74cc nominal. Heads were milled but only to resurface the deck. Also, very little grinding was done in the chamber itself. I had 4 cc's in a single valve relief on the piston. A 557 inch engine makes getting high compression very easy even leaving the piston down from the deck a little.
I did expect/want the engine to peak at about 6000rpm. With this cylinder head and displacement the ports get very high velocities at even moderate rpm so horsepower and torque tend to peak early. I was glad to see the torque peak under 5000rpm too. What's deceptive is that the engine doesn't really "brick wall" at 6000rpm and it doesn't really fall off much at all to 6500rpm which is about as fast as the customer is going to rev the engine.
Large engines can really swallow a lot of cam timing yet still remain quite tame. I had it idling at about 1200rpm on the dyno and it sounded surprisingly mild.
Sounds like it has a really nice power curve and good manors! Thanks Steve