I have an old Chevy performance Parts Cat (2001) that shows PN 12555879 8" for 70-74 Z28 and L82, and ZZ4, says it is 1 11/16" at ring. 7 th edition of Chevy Power from 1994 says 1969 Z-28 used a 1 5/16" damper PN 3947708, which is discontinued. They also showed the 1970 LT-1 and L-82 to be 8" x 1 11/16" PN 6272224. I have a 7704 damper which is 1 5/16 ", came off a '69 Chevrolet, and also had the -772 fan. Now since my damper is long gone, I need one as well! A buddies Z is apart right now, but I was thinking his damper said 7708L, and looked fatter than 1 5/16".
So, to make a long story longer, what IS the word on this!!!