80's Turbos were built at a time where narrow tires were the rage... but this looks really tight for a 700c rim... It just LOOKS 27" to me...
But with those calipers and the rim/ pad match (And I don't like the match either as advised earlier)
I would for sure go with a more "sporting" for the era tire, 23c MAX. with less tread, not tour guard or heavy tread.
I too want to see what the front wheel looks like.
Pulling the rear wheel back in the dropouts will also increase the distance to the brake bridge. This I would do too, and adjust the brake blocks as low as possible, they don't have much adjustment to the eccentric, but there is some.