58-63 Rambler American,
and 1958-61 Rambler, Rebel, Classic, and Ambassador.
There is a chance of breaking the lower control arms with the wrong shocks.
The factory set up used 2 steel spacers that fit inside a rubber bushing:
these pieces with their serrated edges lock into place when torqued to 110 - 125 ft lbs.
thank you to Doug Galvin @ Doug Galvin's AMC for the information.