31's should fit, if using stock wheels expect the tires to rub on the frame and sway bar at full lock. So if I went with two wheel drive (or specific back spacing?) basic rock crawler rims with 31" mud terrains with a 3 or 2 inch body lift Would I rub on the frame? if so can it be fixed?
Also before I get rims and tires my suspension needs a tune up. Best I know it is stock in my 94 lt 4x4 4 door blazer. Right now the rear sits a little lower than the front. So I want to replace the suspension and get it ready for the addition of body lift with rims and tires. Please keep in mind i will be adding some weight to the front and rear with a winch bumper. What would you suggest for my suspension? Do leaf springs need to be replaced? Should I get something better than just oem replacments to help handle the soon to be addition listed above? Help me make this beast over!! Thanks In Advance for your advice

 

wow i get no love not even a "USE THE SEARCH BUTTON"

 

Search threads below! There you happy now.. Ahahaha... If you are worried about rubbing at full lock, then get an aftermarket wheel with a 4.5" backspace. Being this is a first gen blazer I am not sure what rubbing issues they have. But I know with second gen blazers the body lift solves those rubbing issues.

 

That would solve your frame rubbing issues... and yes, a body lift should keep the front fenders off tires.

 

what is the stock back spacing? does a 4.5 would put the rim further away from the frame right? and of course that is where the body lift would have to come into play. What shocks would you recommend to handle some good weight and is it wise to just replace the rear leafs of get them re done or even add a leaf? Thanks guys for the response!!! Oh btw I have read all your post on lifting some great info my friend very helpful!!

 

stock backspacing is 6" so a rim with 4.5"BS would stick out 1.5" on each side. for shocks i like bilsteins, but kyb and monroe are also very good as for the leafs i would just replace them with new ones that way its just one less thing to worry about.