fuch

I've got bilstein hd on the 64 & I want to get my machine shop to make up some new spring perch's for me on the rear like these I had made up for the front but does anybody know for sure if the HD'S have the same size perch as stock boge rear shocks ie thread pitch& diameter size as if not I will have to take a shock out and give him a perch off a bilstein as a guide & if poss I don't want the car off the road as he's good but runs on Jamaica time!!

THESE ARE THE FRONT I HAD MADE BUT ON THE BILSTEIN THE PERCH IS A DIFFRENT SIZE TO A STOCK SHOCK PERCH



Thanks fuch