Hi everyone. new guy here.  i am looking for some info on k30 trucks and axles.  I have a 84 k30 dually cab and chassis truck with 11 foot bed.  I have picked up another k30 single axle truck that some had taken out the front axle.  The second truck is a 85 regular cab with 8 foot bed.  What i am contemplating is taking the dually front and rear axles off the 84 and putting on the 85.  First question i have is are the frames more or less the same between the two as far as being sturdy and able to take the same abuse.  The 84 looks to be a little more stout in the rear section of the frame, although i really havent looked up under the 85 real close.  My second question, are the axles a direct bolt in front and rear.  I thought there was a difference in width from a dually that had a regular bed to a cab and chassis truck.  I am wanting to do this because i dont need such a long truck.  To hard to turn in tight spots and just manuver in general.  I could cut down the frame on the 84 but i dont really like the sound of that and also the rear-end sets more towards the very back of the frame.  Then i would have to scab on some frame on the back to make it look right.  If anyone has knowledge of this i sure would appreciate some input.  Dont know if i should do this or just redo the 84 frame. Thanks in advance.