I would trust stock worked OEM chrysler rods than any of them chinese scat junk or any of the rest of um. Simply cause the metal in them stock ones are better than any of it comin from china.
Plus by having your local machine shop do the work you are helping out people here at home and not over in China.
Personally I think reliability and 4 inch cranks in a SB don't go together. And my little 340 sees 4,000 rpm's plus on the freeways. Its got 3.91 gears, 26 inch tires and I go 75 mph plus, no harm expecting watch the gas gauge move down