DOOH!

I will have to take a look at that!

Will

I hope this will help;

http://carfiche.com/fiche008/s30/index.pl?5:i:2

The shorter knuckles are down as options, and there are different part numbers for the standard length knuckles for the early cars (with a swap date of Jun/'70), as montoya_fan01 says

Cheers

Ian