I'm gathering information to potentially build a Brockway conventional tractor. The A.I.T Brockway 3 series kit would be the cab used. What readily available kit donor would work best for a frame and axles? I'd like to replicate the twelve-cylinder Detroit powered trucks I've seen on Youtube. I don't know a great deal about Brockway trucks or diesel trucks in general. I have built truck tractors in the past, so I'm familiar with the general process. All input, advice and opinions are welcome! Thanks!