Dear Racing Junkies :-)
Nobody could help me ,so far.
Now i found out that 1 1/8"-26 and 1 5/32-26 spline is the same size of input shaft.Known as GM 26 spline.
After weeks of research i found this.
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Not even Summit,ACE Clutches, Richmond gear,JEGS and some E-bay dealers could help me and just said get a 1 5/32-26 and you are fine :-)
I hope this info helps someone else as well.
Last edited by Uwe; 03-28-2017 at 09:10 AM.