47-55.1 Replacing A Dash

[mr48chev]

The dash is held in with spot welds every few inches across the top lip an connected to the cab at a couple of spots on the upper kick panels.
You can either sit in the Swiss cheese cab and drill out spot welds or you could cut across the cowl , through the corners of the windshield frame just outside the ends of the dash and take it loose under the dash and take it into the work bench or saw horses and sit comfortably while you cut the spot welds out.

This shot of the inside of one of my cabs that I cut the dash out of for someone to salvage part of shows the bracket with the two bolts that hold the lower part of the dash (orange arrow). I don't think the side of the dash is fastened to the cab down that edge.