I didnt get to build this motor so im not sure on the cam specs i know it has a pretty choppy idle and when we ran a compression check it only has 165 170 psi cranking compression which would mean its a low compression motor right?. i have a set of built oval port heads on A 462 not sure on the casting numbers would it be a better idea to change heads and cam or say to hell with it a put the 462 in?