ive seen them layin body on all 20s. with all the skinny ass tires out these days, i dont see where you wouldnt be able to squeeze a 22 on the back of one. hell, they did it on a hardbody
22's will fit all round if you can get the right width and offset rims along with the right profile tires...
a small bodydrop would also be possible...
you could do it to the doors if you wanted to section the body and ad acouple inches of steel or extend the rockers but if you wanna do it with a normal body drop youre gonna have wheel tubs poking outa the rear