oil puddle on intake

[GREASEMONKEY72]

i have a little puddle of oil on the right side of my intake and would like to know what you guys think is causing it or maybe causing it, stock 350 4bbl and stock intake and i dont know whats been done it to, according to the little pencil notes on the door jam it was rebuilt around 85,000 and i was contacted through myspace from i guess one of the previous owners atlest he said he was and he told me it has edlebrock intake and carb yet it has the stock stuff when i get it, ok enough rambleing, ill take pictures in a bit