[guruerror]

Here's my mods:

K&N cold air intake
Gibson shorty headers
Flowmaster exhaust
Cognito upper control arm leveling kit
Cognito HD OEM-style tie rods
Cognito pitman/idler kit/support
Bilstein front shocks
37x12.50x17 BFG Mud Terrains

Since the mods the truck feels like it can't get out of its own way...like its working its ass off just to move down the road.

I'd like to get the truck back to the stock feel regarding acceleration and shifting...and figured gears would be the next step to help the engine move the wheels more effectively (and maybe more efficiently...while mileage is not my biggest concern, it is on my mind. Before the above mods I was averaging 12.1mpg, now I'm at about 10.4mpg.)

I've orders a Superchips Cortex 2950 to reprogram for the tire size change but am having difficulty deciding between 4.56 or 4.88.

The H2 is pretty much my daily driver. I have a convertible, but it only comes out in the summer. The truck's driving breaks down as follows:

Approximately 18,000 miles per year
City (50%)
Highway (35%)
Off-Road (15%)

So...GEAR EXPERTS...what changes to acceleration, shifting, MPG, etc. should I expect to occur by:

1. Reprogramming with the Cortex for the change in tire size WITHOUT changing gears?

2. Reprogramming with the Cortex for the change in tire size AND changing my stock gears to 4.56?

3. Reprogramming with the Cortex for the change in tire size AND changing my stock gears to 4.88?

Thanks in advance!