20x11 fit on the rear? 4/6 drop

[Fordsmakemesick]

Hi all, I was wondering if anyone here knows first hand or would know if a 20x11 (with whatever offset that would be) would fit on the rear of our trucks with a 4/6 drop? My truck is an c2500 with the sf 14bolt and a 6 lug but " should " be the same offset/width as a 5x5 10bolt I'd assume. I was looking at Detroit steel wheels and I've decided on a 20x8 for the front but they only offer a 20x9 or a 20x11 for the rear option and I'd like to run something like a 295/40 on the rear and have that skinny front/ wide rear for that stuffed look..any help would be greatly appreciated! I'll post a picture of a truck with the wheels I'm wanting but they are only 9s in the rear and would love to pull off stuffing 11s second pic is my truck.

 

[Alteca]

Yep they fit but tolerance is tight.
20x11 +43 offset 1.25” spacer 315/35r20

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Edit:this is a 4” rear drop, with a 1” spacer and rolled fenders I would be fine with 6” drop