... so the answer to DLTALFA's question is "you wouldn't need to change the spring perch if using the original rear axle housing".
But he wants to change to an open driveshaft differential, which gets rid of the original torque tube.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.