I think the rod journal overlap is not a valid concern with any decent forged steel crankshaft, especially with many racers using 4 3/4 inch storke on many high end all out race Mopar engine builds these days I have built a bunch of 400 block strokers motors from mild to wild, with no girdles yet I do swapped the main caps out for the old(Milidon sells the now) Mopar brand Ductile iron and ARP main studs. I do use the Federal Mogul narrow full groove main bearins, part # 4094M My old pump gas 518 400 stroker made 775 HP on Oregon pump swill with the ductile iron main caps and 4094M main bearings, I raced the heck out of it shifting it at or above 7000 RPM for many passes, drove it on the street for a couple of hundred miles also If you want to make a motor that will live at 900 + HP buy a race block