I hate to say this, but the purchase of the later style steering box that has metric fittings has started you on a ugly path.
There are several firms out there that sell fast ratio steering units that work the the '67 pumps, which fit the '67 brackets, which bolt the the '67 block and heads...
You might want to consider backing up and getting another steering box and selling the Flaming River one.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
