5.2 cylinder head questions

We stopped by our local salvage yard today for a few minute's.......... and we spotted a 91 Dakota w/a 5.2 engine and auto tran's. Can anyone give
us some information on the head's......... what casting number to look for, valve size's or anything else on them. The engine appear's to be the original one.What kind of price's do a pair of these head's sell for? Were old school and just not real knowledgeable on the newer stuff. Just thinking about putting something a little better on the Scamp. Feedback appreciated. Thank's