Different lengths for different trannies.If you cut the square end off the cable it is rendered useless as the square end is what drives the speedo.I'd say you probably have the incorrect cable if you just purchased it.
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*