Magnum heads on LA block H.p increase

So Magnum heads are good little heads and the small Chambers are a definite plus for a 318 but only really makes sense if you get a good pair of cheap. 400 horses maybe if you really have the rest of your motor dialed in I don't see it with the 600 CFM carburetor. It would take a pretty serious supporting cast even to gain 35 horses over 302s. But it would be an upgrade.