Bilstein Shocks?

From what I've read "A" body rear shocks are about 20 inches long, while what you want are at least 24 inches long for serious drag racing. "C" body shocks are longer but I think the upper shock bushing needs to be replaced with the "A" body one. All that being said, We are running "A" body KYB's on my sons 73, 4 door Dart with SS springs. But it is not a dragster by any measure. Mopar performance sells long shocks for "A" bodies with the extended travel, but I have not used them personally. Not sure how they would work on the street. I am pulling the SS springs off the 67 Barracuda and am going back to the original 67 Formula S, 6 leaf, 4 speed, springs and Bilsteins for better handling. I'll take measurements with and without SS springs so you guys can get an idea of the difference, but that will be later this summer.