Are you putting them on stock rims (ie, standard offset)? Is it a Diesel? My 95 F-250 4x4 Stroker would not have been able to fit either the 305 or 315s... My guess is that 1000 lb cast iron block took its toll on the front leafs...
That would be for a F150. 250 would have room for a little bigger.33's. 35's if you push the bumper out 1/2"
I remember hearing that the PS powerd trucks have a little less room. Maybe its the heavy engine lowering the front a little. A leveling kit will help a little for sure, and also make the truck look a little more level also. As SS said also... normaly the first thing to hit is that bumper. You can space it out a little, or some people cut the lower edge a little. That helps a lot with freeing up room. Is that one still a TTB front suspention? Or is it the heaver duty one with the solid axle?thanks for the replies it is a powerstroke and I wondered about putting a level kit on it which is just an add a leaf the wheels are aftermarket but offset appears to be close to stock thanks for the help any pictures of your trucks out there?