I am just now dealing with that problem on my 1950 3100. I bought replacements and the bar to the latch was on the top not underneath as original. I looked around for "bottom" bar relays. The LMC truck catalog shows bottom bar relays. So I called them to make sure before I ordered another set. They said their relays had the bar on the bottom. I am skeptical but I ordered a pair. Should be here next week. I'll post if they are correct.
