Okay more info on the dip stick hole. First things first it's not on the oil pan rails, if you remove the intake manifold and move the PCV hose from the crank case breather you will see a FP that is part of the casting on the block. Now look straight down, that's the hole that's cast in the block. It's in between the distributor and the crank case breather mount. This marks a hole that the dip stick goes thru, it's plugged on rear sump old pans. In order to install the dip stick you have to remove the oil pan and punch out the plug. Remove the plug and install the plug from the bottom side of the block up on the rear hole. That should do it. I will post pictures tonight or tomorrow. Oh what is the meaning of the FP marking it's for Front Pump I guess. It does not mean Ford Product.