What would work best?
Well the original frame is a great choice, and in my case I think it's the best choice.

I have new springs, power steering, as well as disc brakes front and rear. And it all looks pretty much like it belongs, and the frame fits wonderfully under the body.

I've seen a number of AD trucks on non original frames, and I've yet to see one that looked right.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-