The A12 cars had the std bumpers on them even though they had a Dana. They were 383 cars taken off the line so they were missed.
They were built off 383 spec cars, they never had the hemi reinforcements , only the hemi rear springs and tbars ... just like axle package 383 cars, the pilot cars may have been taken off the line but once actual production started they were built in batches on the line with only special treatment for the hood install once it was fully assembled.
8.75 and dana 60's had the same axle tube diameter ????
