The determining factor will be the backspacing and offset of the rim. Also is the rim a 10" rim? I'm running a 35" Toyo MT on 20"X9" wheel with 5 5/8" backspacing and an offset of +14mm. I've never had it rub.
Try to get a backspacing value as close to 6" as possible and have a positive (+)offset and you will be fine.
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'07 2500 5.9L Mega, Black, Laramie, 4X4, 48re
Isspro's, AFE Pro Dry, BMK-11, Edge EZ,
Smarty
JR.
422HP/854TQ
IAFF Local 1159