KULTULZ,
Received the PM with the sites, thank you.
I installed the factory PS on my 53 Merc last year and could not for the life of me find the crush nuts. I had to improvise by taking a fender "J nut" and cutting of the bottom piece and then soldering it onto a coat hanger and then threading it threw a bolt hole in the frame and and down to the hole in the frame where the crush nut would go. Then I mounted the bracket with the other two bolts and then very carefully threaded the bolt up through the hole into the nut. It works fine but I always wanted to have the correct insert in the event I do it again.
When I was looking all I found were Sert's and they are round, and from the feedback I got, they didn't hold all that well anyway. Thanks again.
Merc Cruzer