Other than the lack of roller bearings, disc brake kits, rearend gears I don't think you'll find any real surprises. I'm sure you've seen the hundreds of posts on the subject.
The only real surprise I've had with my 3600 and 3800 truck is the lack of good running boards and bedsides out in the market place. With yours being flatbed, that's not really a concern.
I've seen your photobucket pics, I'm sure a guy with yor talent will be able to tackle anything the big ol girl throws at ya.
