I could use some help identifying a pair of original brake pressure differential switches. I've attached a pair of pictures that I hope will better explain my question.
Which of these (if either) is a 3983040 brake pressure differential switch as used on a 1970 Camaro? The only difference I can see is that the cleaner one includes a plugged fluid port in a place where the dirty one is solid. The internal parts are identical. I have two like the dirty one that I bought as advertised for a 1970 Monte Carlo (which the parts catalog seems to group with Chevelles) and a 1970 Camaro. So, what are these? What other cars were they used on?
Thanks for any insights...
