There is one major issue that I highlighted in a post in the Hall of Fame:
You cannot mix and match lower control arms with subframes due to the location of the bump stop.
For FGF's: On '67 subframes, the bump stop is on the frame behind the coil spring, for '68 the bump stop is on the control arm behind the spring and for '69 the bump stop is on the control arm IN FRONT of the spring. You must have lower control arms that match your subframe or aftermarket types with multiple bump stop locations.
And early '67 F-Body subframes will not work on later Nova's as they are missing the 3rd radiator support bushing hole that the Nova's utilized (different from either F-body)
The info you got about Nova's is incorrect. In 1973, the Nova started using the 2nd Gen (70-81) F-Body subframe. So your good Nova's for interchange are only '68 - '72
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
