trailing arm upgrade number???
 

just installed 75 aluminum trailing arms into a 71 coupe. how do i upgrade the very small six bolt stub axle to the larger six bolt stub axle? is there a later year that will interchange ot will it require that i change bearings, hub assembly, as well as the stub axle. thanks for any help, larry

Larry:

Both should have four bolts, unless your arms are from late 75. Warren posted the changeover point.

Do a "search" under "aluminum trailing arms" and you will find dozens of threads describing the problem you are having.