HELP NEEDED WITH A DASH FRAME INSTALLATION

Same here. Put a '68 Barracuda dash frame (with extra holes welded shut, etc.) in my '72 Duster and the bottom sat so low on both sides I had to get a bottle jack in there and jack it up with all the top bolts tight.

Worked fine. My thought was sandblasting it caused it to distort but it was just old interior paint and minimum surface rust so I don't think they had to blast it hard enough to warp it.