225 engine spraying oil

I have a 73 duster that has a 225 slant six, on a trip back home my duster ran good. but when I got to the destination we lifted up the hood and seen that oil was sprayed all over, we cant figure out where its coming from, we thought it was the coil, the oil sending unit. we don't see any leaking while it runs or turned off.

on another note the valve cover breather let oil into my air breather would that have any cause in my problem


also its spraying on the passenger side of the engine bay