Those are good tips, I can only add that you should adjust the cab/doors/wood while it is bolted to the frame, shimming as necessary.
With shims you will have to tilt the cowl section fore and aft to get the doors to align with the rear of the cab. You must have the door header pieces bolted in place to do this, front and rear headers are not necessary at this point. I also left out the seat-back wood at this point. I didn't tighten the bolts in the door jam wood at the bottom either.
It will be a good idea to set the radiator in place and check the fit of the radiator/hood/cab as you get close. I had my cab very close and then found out I have to start over. I found that on mine I would have to drop the radiator down another 1/4" to get the cab/hood/radiator to line up properly. I have a late 29 CCPU with the 30 crossmember so I know I have to change the shims on the cab to make it work.
I got sidetracked on another project, but here's what it looked like a couple of years a go. I hope to get back to it this summer. I did a lot of trial shimming without the cab corners on. By looking at the tops of the doors and matching the opening in the doorjam wood for the latches it was very close when I put on the corners.
I would sure be helpful to have someone helping you do this. You have to bolt the cab down tight and check the fit, then remove the bolts adjust the shims and bolt it tight again and check the fit. It would be great to have someone hold the bolts on the top while you loosen/tighten the bolts from under the truck. It's a little rough wedging in a box end wrench on top and then hearing it flip off while you are underneath trying to loosen it...