My mistake, I thought it was an 850 CFM carb. Well then I'll adjust my total HP guess up to
630 at 6,100 rpm, with the torque still 610 at 4,400 rpm.
Now I think your limiting factor will be the cam duration. You will prably be able to spin it up to 7,000 if you wanted but you will need a bigger cam to make more power at the higher RPM. Nevertheless 1.3 hp per cubic inch is a very respectable amount of power from a 60 year old wedge head design. As Rumblefish360 said it is never enough. And there is always something you can change to get more power.
As for me that is the fun part of a NA engine, searching for that next thing to improve to get more HP. For the turbo guys it is simply a matter of turning up the boost or the NOX guys just bolt on more and bigger injection nozzles (and hope it holds together).
I'm glad to see you are going the NA route, but as you already know, that is the hard way to make power. (but the more satisfying way I think)
The next thing is going to be getting all this power into the track, and chassis tuning can be a new set of challenges. Will you tell us about the car you will be putting this into?
