Are those 285/55-22 tires? If so, the actual size of the tire is nut very much larger than the stock 275/65-20's. However, the stock wheels have a +19offset and your aftermarket 22" rims might tuck in just a slight bit. I bet those rims have a +18 to +22 offset.
If you're set on those rims. if those are indeed 285/55-22 tires, you could throw a coil spacer on the front to level it. However, you will limit the travel of the shock and you will sacrifice the ride comfort. They also have been reports of them failing. Here is what coil spacers look like:
Daystar Front Coil Spacers
The correct way to do it would be to replace the front coil and/or front coils and shocks. You will get the 2.5" level, but will not sacrifice the ride comfort. CST suspension states you can use the stock shocks with their lift coils. Maxtrac sells the shocks and lift coils for about the same price and are designed to work in conjunction:
CST Suspension Front Coils Only
Maxtrac Suspension Front Coils and Shocks
What size tires are those and what make rims? Reason why it's important is that you might be able to run a front wheel spacer to give you enough clearance. What makes you want to level it? Cosmetic? Rubbing? Personal Choice? etc. etc.
