Use 1/2 inch diameter bolts into the factory's rough pin alignment holes at the bottom of the firewall inboard of the frame rails itself for the "gross" alignment. Install, but do not torque down the mid and rear subframe bolts. You want the subframe to move a bit with effort.
Refer to the subframe alignment dimensions diagram at the end of the 1st chapter of the Factory Service Manual. For those of us with '67's, it's in the Supplemental manual. The corner to corner alignment specs from the midpoint gauge holes are the most critical. With the body suspended and the subframe free (not weight bearing), whack the subframe with a rubber mallet until those cross dimensions are perfect. I did this last part with the engine/tranny and front suspension already attached.
Last edited by salmon38; 09/20/1704:11 PM.
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
