Can anyone tell me what SS class the 383 Roadrunners were in as of '68? SS/G maybe? I know at that point, the 440 GTXs ran in D/S or D/SA, the SS versions ran SS/F, and the 383 Roadrunners ran in E/S or E/SA, but was wondering what class they were in as of '68. As of '67 there were only 5 SS classes, A-E, but obviously that changed somewhere in 67-68. Not sure how far down the alphabet the list grew to by '68.