Update!! Spoke with Brent and referred to his post at
https://www.fordbarn.com/forum/showthread.php?t=119693. Used heat with my rosebud--no quenching- and the frame returned to a sag of a sheet of paper. Follow the logic he presents, and bottle jacks and frame machines have no applicability. After a coat of paint I can return to re-assembly. Thanks Brent!