275/40/20s anyone running this size?

[staggerd86c-10]

I came up on some 275/40/20 nitto 555r drag radials for my truck for a great price (free) but i would like to see if anyone is running a set up with this tire in the rear i know there are a few of you running 295/40s but i would like to know what difference would this be and what i should run up front. my truck right now has a 3/4 bell tech kit but i have take out a few more leaves in the rear and when i get it back from the paint shop i will leave it with only 3 leafs left until i bag it, and im cutting a full turn off the front also until i bag it. any help would be great and trust me when i get the truck finished up i will have pictures posted before my friends see them.