my local machine shop asks $40 to inspect my valve guides and press in new (16) valve stem seals which I provide. The stem seals are about $1.33 each from Honda/Acura dealer but I got mine in a gasket set. If your taking the head off, you must replace the headgasket, and you SHOULD replace the head bolts, I suggest ARP's but you can get aftermarket bolts for $55 from Mad Dog racing. ARP studs will set you back about $120. A headgasket on ebay is about $40 new. If you drop the pan, replace the oil pan gasket $10, and the oil pickup gasket $5 you must replace this! While your doing all this get the head cleaned, its $50 at my local machine shop.