There is not alot you can do about the ergonomics of the early Mustangs as they were built. Putting in a moveable steering column, smaller steering wheel and actual brake power booster will give you more room. I have kept the suspension and steering on my car up to specs and just accept that the car is the best they had 50 years ago. It is an extraordinary change for me when I go from one car to the other. Good luck!