440 cam selection question

I don't have valve springs yet. The reason why I'm looking at .500 lift capability is because I wasn't looking for a cam with more than that much lift.
The ported heads are some that my cousin used on his old 440. I'm a novice, so alot of this is not set in stone.
I understand now. But in limiting yourself to .500 lift, you completely REMOVE any advantage your porting gives you....in other words, you're effectively wasting whatever money you spent on porting. If that makes sense. Porting the heads was the superhighway to choosing a cam with greater lift than .500, since the stock heads can handle that much flow at that lift. Is this an engine you plan to run headers on? Forgive me if you said and I overlooked it. If you plan on headers, then that even negates further your port work if you stick with a cam under .500 lift. At least, that one old dumbass's opinion. I would be looking into cams with .550-.575 lift.....that is of course using the flow sheets as a guide. Is a solid lifter cam out of the question?