anyway, about the oil leak, did you mean the tip of your spark plugs (the one that goes inside the cylinder) are covered in oil or the outside part where the plug wires go, if the latter, then most likely it is leaking from spark plug tube seals. check the distributor seal too, that can leak sometimes. i don't know what you mean by little square gasket, if you mean the small square one INSIDE the valve cover, that gasket mostly just helps with oil circulation to the cams and valves and should not cause external leak. and if you mean splashing like oil over the belts, then it is probably the front main seal.
"...and the Lord said to John, Come forth and ye shall receive eternal life, but instead John came fifth and won a toaster."