w-lewis,
Have you given any thought to where the petcock will be mounted?
If it replaces a downward facing plug it will reduce your ground clearance. It was surprising to me how rapidly an
oil pan drains completely if the plug is sheared off.
If it faces the side of the car it would seem to be much safer for driving, although it may leave a bit of old
oil in the pan, since that's not the lowest point of the pan.
Tom