5 point harness in a car w/o roll cage...How to do it?

pauly v.100 said
the federalies mandated shoulder belts in 68. before that they were an option but not required. (any) car built prior to 1968 cannot be ticketed for not using shoulder belts unless the car was equiped with them.
dam so this means i gotta find a set of sholder belts for my cuda, anyone got any