I don't know about a six inch lift but I have gone with, as many others on this site have, a 2.5 inch front level kit and a 1 inch rear block to fit 34 x 12.2 x 18 inch tires on the stock rims and have had no problems with the VSC.......

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08 CrewMax, SR5, 5.7L, 4x4, OEM fog lights, tow pakage,
ProCoat spray-in liner, low profile tool box, nerf bars,
2.5 inch Ready lift front level kit, 1 inch super lift rear blocks,
and BF Goodrich All-Terrains 305/65/18....Oh, a little skid plate trim too!

Slowhogg...............