So Here goes!
I used all of the dimensions from the Mopar Engines Manual, P5249704.
I used a 0.701 Diameter Counterbore with a 35/64" pilot for the 1/2" pipe tap,
An 11/16" X 9" long twist drill and cut the shank down to 1/2" so it would fit in the Milwaukee Mag base drill.
I also used a 35/64" drill to put in the original bore to line up the "Rig".
I cut the 1/2" pipe tap diameter first, then put in the 11/16" drill and went all the way down to the intersection
with the cross borethat feeds the oil pump.
After that, I went in through the oil pump feed bore with a round ball burr on a die grinder and made everything nice and smooth
around the corner where the two holes intersect.
The 35/64" hole in the block is at a compound angle to the oil pan rail so i measured the angle for the plate at 35.5 degrees.
after fabbing the plate, I put the plate on the engine and stuck the drill in the chuck and lined it up. I used two allen set screws
upside down to transfer the location of two oil pan rail holes to the plate and tapped it with a hammer. Then drilled the two holes
5/16". Bolted everything up and did the Mod.
I've heard of guys doing it by hand, but I went with the Milodon Road Race pan and with the price of the pan and then having to
pay $90.00 bucks for the pickup, no way was I gambling with that. (Plus this is MY engine)