That looks a big improvement!
They’re ok. Had to do a repair between the 1 and 2 mounts. But the no 2 mounts only had very light surface rust but have cleaned up fine. I think the windscreen rust was because 20 years ago the header rail was leaking into the car someone bodged a seal and trapped water in the windscreen frame.What are your number 2 mounts like? With the amount of rust you had in the windscreen frame, I'm surprised they are not rusty too (mine were).
The other thing that might be affecting you is the L88 flares are designed for the 68-69 cars.You have no idea how lucky you are that you got a decent set of flares. I'm in the process of glassing mine now and both passenger side had to be cut in 3 places to get the shape right, I think they had been removed from the mould before the epoxy was fully set so the shapes were terrible.
Sadly cutting the bottom of the wings was the easy part. Driver side fitted nicely, passenger side were both about 4 inches too long so bending them in to shape caused the top to flex outwards so there was a 1inch" between the arch and the tire (other side is less than 1/4") so it looked terrible. Got there in the end after cutting it in to three pieces.The other thing that might be affecting you is the L88 flares are designed for the 68-69 cars.
They changed the shape of the lower portion of the wings in 1970 to stop stone chipping.