mentioned your build to another tech at my dealership the other day, hes been with subaru since 1970, he said he had an FF-1 sedan in lime green when they came out. so jealous hahha. speaking on terms of old gems, this came in for service the other day:
1983 GL-10, all originial, 46,000 miles.
good luck with finishing everything up! i know its a long journey haha