Someone mentioned a Sebring convertible.........they have 17 of them at my local UPULL and those front seats have built in belts. How well would that set up fit in the '68?
The sebring seats are the same size as the factory bucket seats. They fit very well in 68 cuda . Just a little frame mounting work and you have a seat with power and a shoulder harness too. Use the later model seats as they don't require a separate part to activate the shoulder harness lock up... a search on the internet will provide more info