The question you should be asking is, should I take my heads to be looked at? And the answer is YES. We cant tell if your heads need anything, but an engine builder will. Just take the heads into a machine shop, tell them you want to have them looked over, check the pressure of the springs, check the valve seals, and all that stuff, shouldnt cost you more then 100 bucks. Now if you have to start replacing things it'll get a little more expensive, but just tell the guy you dont want to replace anything unless its bad.
I bought gt40p heads from a guy, slapped them on, and now im kicking myself for not getting them looked at, because it seems like I have a bad valve seal. Itll cost ya double if something NEEDED to be changed while the heads were off the car, then you gotta take them off, pay to get them fixed, and then spend all the money again to put the heads on. Its a pain in the ass. Get it done while your not in a hurry and their off the car.