[motto]

I don't know the reason for the change in the location of the spring and was unaware of them ever being in the lower position.

On the L/L Chev which is what I am familiar with they used the same set up. If you look at the bolt in Phil's picture you will notice that it has a step in it adjacent the thread. On the trucks I've worked on I was sure that the lower hole in the crossmember was smaller and would only allow the bolt head and spring to be installed in the upper position. I've just been outside to have a look at a couple of crossmembers and find that I'm wrong in regards to those two at least. Was I imagining it?

David