I spent several months working with Steve at The Filling Station. We actually were working with Steele to get them to change their extrusion die. They had been using an odd 3/8" die but we could never tell why. It was too small. At this point the very best weatherstripping you can get for the doors to the cab is the 7/16" thick material (may be sold as 1/2" but is really 7/16") through Filling Station. Steele may sell it themselves, but I know The Filling Station has it. If you get the 11/16" stuff (and this will be true no matter who makes it), it will be too thick and you'll end up having to slam your doors to shut them. Run your two-tone line where the stripping will cover it and apply using the contact cement type stuff...black. This is a link to that product:
https://store.fillingstation.com/detail/K-124T/Chevrolet_194955_TRUCK_DOOR_SEAL_KITTHINNER_12.html

Good luck!

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end