Put some air in the tires (which are not in that bad of shape, not as old as the bike for sure). Adjusted the front brake so it doesn't rub. Adjusted the seat post to a much better position. Took it for a spin and it rode great. Shifting works find and the brakes, while a little squeaky, were not bad either. Grip tape seems to be almost new. Wheels are not 100% true but seem close enough.

And from all the pictures I've seen, I am going to guess this is an Interlude from the mid 70s.

All in all, happy with my new bike