I have the subframe from a ’68 Nova 4-door under my car.
The issue with donor subframes is matching it up to the lower control arms. That’s because the location of the lower control arm bump stop was completely different in ’67, ‘68’ and ’69. So you either have to use lower control arms from the same year as the subframe or aftermarket LCR’s with adjustable bump stop locations Obviously there is a problem if you have a ’67 Firebird and want to use a Nova subframe. I went to tubular upper and lower control arms so I was OK.
There is also now the option of going brand new. Rick's Camaros is now selling new repro subframes for all 3 years.
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