[Lew Silverman]

Maybe the prohibition against the "truck rearends" was based on the fact that a great many of the 3/4-ton (and up) trucks used a "full-floating" axle? I know they were a popular upgrade for the circle-track folks, at least until the Frankland/Winters style became popular. The rule has been on the books forever, and probably easier to enforce than "no full-floating axles". Would be interesting to see what the Tech Department in Indy has to say!