i have a seat issue.

hey i had the same problem on a 72 dart what i did was go down to the hardware store and bought a long bolt that was the same diameter around on the part of tha bolt that had no threads then i took the bolt home cut the head off of the bolt and the threads off of the bolt only leaving the full part of the bolt left then i stuck in into the hole and welded the remaining part of the bolt to the seat good luck Justin