Excellent point. I didn't think of that. The person I bought this from stated that his GMC pickup was a 54. It may in fact it may have been a 55 1st series. I know the 55 1st had an open drive shaft.
My truck is a 54 with enclosed drive shaft.
The photo below show the alignment pin location on the spring that came off the truck and the one I was seeking to put on the truck -- painted grey.
Photo 1 Photo 2 Walt
