I don't know much detail about the oiling system itself, but the build was first done in the '70s following all the tips in the SA Books "Mopar Performance" including "X" heads with full port/polish by Bob Mullen. This guy (engineering student with access to money) from Roswell, NM ran a Challenger with an over cammed stock 340 and set up street races for big money, then came home and swapped this motor in for the races!!!
He unfortunately died young, and his mother, Juanita, gave me the engine after she'd stored it for many years. When I got it, it had "mountain" pistons in it. I had to rebuild it for street and tried to do it "with respect" with the best machine work I could find, etc. Full details in the thread "Help with 340 compression + cam change.
Does anyone have any information about the "A&W crossover"?????? I know who did the heads, but do not know who would have prepped the block. I remember the machine shop telling me the crank was full radius (?) and rods "side clearanced" among other things. I built it myself, but when I picked up the block and heads I remember the shop owner telling me, "Man, somebody broke the bank on these heads!!" He told me to sell the heads to buy some nice after market heads and finance the build! (.....I was given the motor, and in honor of that will not part with it. )
The block had been de-burred and was white inside (epoxy?) and they tanked it in the aluminum block tank to save the paint.
Any knowledge of this oiling system set-up and who did these would be very helpful.