Re: oil pan troubles
If I understand your post correctly, you are having troubles with the oil running to the rear and up the pan under acceleration.
First of all it takes big time power and hook up to cause this trouble, and I do mean big time power.
So I would first make sure something else is not wrong,oil pump pick up came off or not correctly adjusted to the bottom of the pan. I had a car where the pick up came off, it would loose pressure when I braked hard. 69 Camaro when I was a kid, I bought a big Moroso pan and all and discovered the real problem when I changed the pan.
Otherwise, the swinging trap door is for deacceleration, what you would need is the baffle that bolts between the oil pump and the main cap. This blocks oil from riding up the back. It is very inexpensive. You should be able to find it in Jegs, Herbert, or Summit easy enough.