I was thinking of lifting it and getting the 33x9.50-15's under it but as of right now it is struggling just to pull the stock tires. I've got to check the gears (they feel like 4.30's) and get the Engine management happy. MIL is on, probally running in limp mode. once I get these few issues worked out i'll go from their.
Big concern is it has to run a comfortable 75 mph for 1/2 hr each way every day. This my limit the tire size to 31" or less.
If I can narrow down the Turbo and the associated fuel management issues that arise. Then it would probally turn 75 mph ok on 33's.