A good mechanic/fabricator can name his price. Just in case you get tired of trucking I believe you have potential to run your own shop from all the work I have seen you post.
A polish job, hub caps, and lug nut covers would really take this thing to the next level. Looks good.
I agree with Banker. You could be building that as a side business completely tax free if you do it as an accessory to the trucking business. Everything you need to start a fab shop can be written off and justified as an expense for the trucking deal.
Trucks like yours were some of the best looking rigs on the road all around. I loved those slant nosed one's. Got to drive an old 9200i daycab at my job and it was awesome. Old Eagle interior, C13 and a 10 speed. Rotted out muffler behind the cab made it even better. Only thing I hated was when I would shift into 3rd, 5th, 8th or 10th my elbow would hit the back window and my arm would go numb