Same thing with my '77. I finally cut a small access hole inside the air intake (removed the intake cover). One of the nuts vibrated all the way off and the other has a rust build-up so I can't tighten it all the way. I will be installing a new bow eye next week. It is kind of like building a ship in a bottle, but it is do-able.
Two 14" 5 lug S5 wheels with ST205/75R14 Kenda Loadstar radials $349
Two 14" 5 lug S5 wheels with ST215/75R14 Kenda Loadstar radials $389
Two 15" 5 lug S5 wheels with ST205/75R15 Kenda Loadstar radials $409
Mounted, balanced and delivered.
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CARBURETOR REBUILDING - $199
Parts, labor and return shipping included
2 LED 6" BRAKE LIGHTS DELIVERED $32