Brad ,
Some are aware i went down this route , 505 cnc stealth heads . Stock port size . I knew port was too small , not much more than a reasonable sbc head , so i traded off with duration . Dwayne wasnt a fan , too rowdy , Billy got it . But i chose it and daily drive it . Best et was 10.50 on the brakes , but solid low 10.50s . Which was my goal . Drive to track , swap rear tyres and air cleaner and race . So good easy power using a solid ft cam , motor was only shifted @6000 . Won track championship with that motor .
Just my 2 cents

Tex