Creeping dipstick on /6?

74 Dart Sport 225 /6 1bbl. I'm getting oil all over driver side of engine compartment (under hood, tip of the air cleaner, and power steering lines) can't seem to figure out why? I had somebody else work the throttle while I watched and it appeared that maybe the dipstick creeps under load? Anybody else ever had this happen? The heat riser also look oil soaked too.