Will a set of 16X7 fuchs fit on the rear of my early 914-6? the fenders have not been rolled. I've heard different opinions. The wheels come with some 205 tires that I will probably have to swap out with 195's, but just wondering if I could make these work?

Barely....fronts should be no problem....it's the rears that may require the bat treatment to the fender lips....depends on the tire manufacturer.

I have installed 7x16 with 205/45's but had to roll the fender lips.
I would use 195/55's and you should have no problem. The tires are the problem, not the wheels.

have 16x7's all the way around with 205/55's...... no rub and didn't need a roll in the back....