Hi All, I am using all of the accessory connectors in the fuse block on my '73. One of the posts/connection is loose and I believe it is causing the car to die from time to time. I have looked at the major vendors and do not find one selling new boxes, just the wiring harness with a box for $$$. Is the box available by itself? If so, would it replace from under the dash or thru the firewall? Looks like a PITA job!