It is easy to forget this rule:
Retard the cam get more room on the intake valve --EASY -- sometimes it is just a case of having cam advanced a little too far -- This can pull you out of a jam and sometimes. ---you find that engine runs better than you imagined with cam in a different position
Fun to note-- that on a dyno --if you take your time and move a cam around a little you discover things that do not fit conventional wisdom ( which is Highly Over rated)
Many cams we know and love like the 590 solid and the world famous .650 lift Comp solid , a cam that is a Herb McCandless original--It loves being in a 440 at 100- 101 range and a 500 at about 104--then it will rock but straight up you would have to turn big RPM to get the juice out of it--