Whats the best pair of truck mudding tires for a '92 blazer with 6" of lift? Full Size? size of tire as well?

go down to a shop that specializes in tires like that, and talk to someone who knows what is available and what will fit. There are any number of tires that will fit under that truck, and what one guy likes, you may not. There is no shortcut to this process, you need to start putting tires up next to your truck, Even Paying to mount or dismount a new tire to see if it looks or fits right