I have finally figured it out. The truck was hit on the driver side door and I thought the damage was isolated to just the door post area. After a lot of measuring I have figured out that the cab is pretty bent. the width at the dash is 1/2" small, upper firewall/cowl area bent down about 3/8", lower firewall area pushed back about 3/4", and the door post is twisted and pulled forward about 1/2". It all started to make sense when I put a straigth door in the hole for the driveside and found the gap at the base of the windshiled/cowl area was about 1/2" too big. Now that I know whats going on it should not be too hard to fix. This explains why I got a virtually rust free, cab, door and bed for $4oo bucks. I do not think the cab was on this frame when it got hit because there is no sign of damage on the frame. A couple hours on the frame rack and she will be as good as new. Good thing I have access to the frame rack and just happened to have the door post section from another cab I cut up.