Hi guys, I'm selling my stock cylinder heads on ebay, they are from my speed density 88 gt convertible.. had a question about the numbers on the heads.. have been working lots so haven't had a chance to go out and check... anyone know where I would find the numbers... or does someone know what the person would be looking for ???? Oh and I have a feeling I won't get the 200 dollars from them... think that's too much.. too little?? with rockers, valves, and springs..