Shouldn't have 'pins' since the '73 - '76 A-body calipers were of the sliding type, with a springy plate on each one. Possibly a slight issue with the caliper seal or M/C? Smarter minds than mine will zero-in.
Here we go again (sigh) - having to reply to and explain my own posting. OP stated his calipers came (he believes) from mid 70's A-body - - so they would not have pins. Thank-you. :p
