need tire and rim size help

i am looking to replace the rims and tires off my 73 duster they are 5x4 14" i want to go with wider tires and my rims are only 6", i am going to go with cragers 14x6 wide upfront and 14x7 on back, i have done no mods to springs or anything, does anybody know how wide of tire i can go on back without hitting springs or doing any mods, i also have air shocks so that will help with clearence on fenders, any help would be thankful
Author: admin