Napster- I have the Exact same engine specs as yours, my CR is 9.8, same exact cam, I idle at 700 with mine but it’s a 5 speed in a light 87 Formula, it revs very fast. I had my 47 heads done by Steve25 to flow 250 and the car is scary fast, and will break tires loose on command. all the cam the motor needs IMHO. I have built 461 before and this is my 2nd 434, I prefer the 4” stroke.

325 cfm on the intake side ( assuming your intake manifold can pass that ) has the potential with increased compression to make up for port volume to make 87 Hp per cylinder, or about 660 Hp.

That being said and as already posted with your cam 600 Hp can be had.