well sorry buddy. this engine was taken out of a wrecked one, i have the paper work in my hand, it just doesnt tell me the s/n of the engine. after reading the engine repair section in my book i discovered that the the engine number 5243b or whatnot and the s/n are located just under the cylander heads. thanks for your info tho to the first guy, it says its located on a sticker and pressed into the metal. and the water pump goes for 115 or so as much as i have seen. but i get a discount to make it down to 90, even with core charge. buying both just sounds like a last resort idea, not to mention i cant have my car in peices for longer then a day, its not my garage im using. all these lil unseen factors might of helped you to help me beter i guess. the information is out there you just have to find it. and i did. thnks again