Will a 275 tire fit in the front of a duster?

The reason I asked is that have the rims that the 315s are currently on and if I go to the 18s to run 335s in back, I wanted to put the 17s on the front with thinner tires. I was told by my tire guy that the thinnest I could go is 275s.
By the way if I actually have to cut sheet metal on this car I dont know what i will do!!! :toothy10::toothy10::toothy10::toothy10
Andrew