71 F250 Oil cooler leaking

[luckydog]

Hello everyone. let me start by saying Ive searched but havent turned up anything yet. I have a 71 F250 camper special with a 360 and a remote oil cooler that has recently started leaking oil. From what i can tell the leak is coming from the engine side of the oil cooler adapter that sits between the block and screw-on oil filter. I havent taken it off yet but i suspect it is a bad o-ring. My question is if anyone knows where or what part # the o-ring might be.

Thanks a ton for any info you guys can give

[luckydog]

After looking further it looks like this is where it is leaking

http://imgur.com/9hnY9s4

Another photo from directly underneath of the engine. you can see where the gasket has pushed out and looks like it is leaking from all around the seal.

http://imgur.com/BD9znfw

[HIO Silver]

No o-ring. It's a gasket.

[mrollings53]

Seeing as how you have oil on your fuel pump; I'd check that gasket too.