Hope this is not true. Moog Offset Upper control arm bushings.

I have had off-set bushings on my '68 Cuda since 1972 when I went to BFG's. The bias ply tires ran well with stock caster, but the BFG's wondered at the low caster setting. My alignment shop said that the radial tires had less dynamic caster than bias ply tires and therefore needed more static caster to allow self-centering. As the stock UCA'a are stout design, I like keeping them over buying aftermarket UCA's.