Joe, you could always order some 2.5 x 6" 3/16" wall tubing and start from scratch, putting both the original frame and the 1T frame in the weeds behind the house. Since you are intending on IFS, need a new trans cross member, the only thing left to mount would be running board brackets and rear leaf hangers.

The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me