1963 c30 project help

[Greatestdane1]

Hey yall. I need some help on my first project truck. I recently purchased a 63 c30 and I will be putting in a 24valve cummins in it. My questions are more frame suspension related than engine swap. I need input on frame direction for the build.
1. Can i use a early 80's model c30 rolling chassis and put my cab on it or should I just change front end? Also what is the latest year of compatible front ends?
2. I was planning on boxing in my current frame to support the weight and torque of the cummins, are the 80's model c30 frames already boxed in or atleast heavy duty enough to handle the additional weight of the motor?

Thanks for any input or help.
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