Yes I agree that it is after all much easier to just shorten a 350 frame then to swap it all over and box in a Wronco frame, but if you don't do it the hard way how are you gunna learn?
My only problem with cutting the frame is rewelding it back together because I only know of 2 people who MIGHT have the skill to do so, so that it is trustworthy again.
I mean if I switch it all to the bronco and box it in then I can always just use zero rates to readjust any issues with the axles where as with the frame it's a lot of making sure it is all precise and square.