I ran the stock 1970/71 6 quart hemi and 440 6 pack oil pan in my Duster with the stock 3/8 440 6 pack oil pickup, shifted from 7000 up to 7800 once seeing where it would quit pulling, it didn't so I shifted it at 7800
One other thing, don't build a stock 440 block, find a decent 400 block and use a 4.300 or 4.250 crank in it with 6.700 long BB Chevy type h beam rods and add aluminum main caps and ARP main studs. Those blocks live a lot longer taking abuse than the same build 440 block will fail at, they(440 blocks) crack the main webbing between the main caps and the bottom of the cylinders Been there, done that
I used elephant ears with the stock tranny mount and moved the engine and tranny back about one inch in my old Duster, it ran 9.993 with the air cleaner on and full 3.0 inch exhaust to the rear bumper weighing 3450 Lbs. with me in it on 91 octane Oregon pump swill
No one here would race me on the street