Is this dually swap going to work like I hope?

[B_derK20]

I've searched this to death on the boards here but can't figure out a definate answer to my question. I have an '83 K20 that I want to turn into a dually. I picked up a dually bed and tailgate, dually dana 60 front, and dana 70 HD pickup rear for practially nothing. I had a friend measure the frame on my K20 and move the spring perches on the dana 70 rear to match since a K30 frame is narrower than a k20. My simple question is will this all plug in like I think it will or am I missing something that will make this not work? I'm afraid of tearing my truck apart and not being able to finish the swap cause I was stupid and missed something. I know its silly to do and won't increase the weight capacity of my truck, but I have the pieces and I love the look of a square dually. Any insight is much appreciated...