OK, now let’s get this straight—within every Mustang beats the heart of a Falcon: Same shock towers, virtually identical control arms, spring perches, springs, shocks, and grocery-getter leaf springs.

Suspension technology has come a long way since the 1960s. The 1964-’72 Chevelle delivered exceptional ride quality and handling for its time because it was a body-on-frame vehicle in a field of unit ...