Not that it makes a whole lot of difference right now but are you by chance holding that subframe tab upside down in the last picture?
As usual I will watch and learn Chief, I have these sitting new in box for my '68.
I will admit I have had second thoughts about cutting into her especially with some of the bolt on or less invasive weld on subframe connector offerings.
I bought them because I deemed them to be the best cure for stiffening the chassis and the cleanest underside once completed.
