86GT 93LX

are non ho 302 heads of a crown vic better than mine? i keep telling u guys i cant put a cam in my motor with flat top pistons...as far as i know. or at least it cant be a taller cam as far as the lobe heights. i dunno, just what people have told me.better heads are the first thing im after, so if crown vic or other non ho heads are better than mine ill get em, infact i got a set but i dont know what year....what numbers am i looking for on the heads to tell what they are??