Bought two 10-24 nuts but the thread was finer. Found two in the junk can that fit. Looks like 10-32. Got the replacement speaker in. I think I could almost replace the rear springs in the same time it took to replace the radio speaker. :icon_smi:
Boy 1967 radio sounds a lot different then the modern ones. The Dart came with a non mopar radio. I found out years ago when I tried to get if repaired and I was informed it was an aftermarket from the period. The guy had a AM/FM from the year of the Dart so I took him up on it.