Opinions on 4 speed with OD

My car is a real 360 4 speed car and I have for years waffled over putting a modern trans in it because I didn't want to cut the floor. In the end, it comes down to driving enjoyment and not cutting the floor is pointless if I'm not going to sell the car. So I am going T56/TR6060.
I appreciate your viewpoint, it is likely the right answer, I cant get my head there though.