is there a difference between the frames of the f150, f250, and f350? I realize they are set up for difference suspensions, but is the frame without the brackets the same.

 

in general,narmal old truck yes,unless it is a 250,or 350 4x4,they have leaf spring front suspention and all the jazz to go with it,if the 350 is a dually then the rear of the frame is narrowed.------> the 150 is the weakest frame,the 250 is better and the 350 is best <------as far as strength goes,hope this helps i may not be completely right but the others will show up and correct me if i am..

 

The F-150 frame is the weakest. In some early 80's trucks, they "swiss cheesed" it at the factory to save weight, making it the weakest yet.

F-250 and F-350 frames are the same, except the duallies are narrowed in the rear.