The dash itself is spot welded in to the cab. I would think it would be very complicated to remove.
If the cracking is around where the steering column mounts, I would say that is fairly common. As the front cab structure starts to fail, the cab tries to settle. It then pivots downwards with the pivot axis being the rear shackle system. At the same time the steering column get pushed lower and it is pivoting on the box in the frame at the front. The two paths appose each other and the loser is the metal on the dash near the column mount. I had to weld mine up there too.
What kind of car do you have on the rotisserie there?
