My 1966 2.0 motor is apart and ready to put back together. Mechanic say's everything looks good only thing of concern is the intermediate shaft "bearing" surfaces. He say's the earily 2.0"s did not have an actual bearing, they rode on the case

He feels this surface may be getting close to the limit and may look into having the case bored and put in the later bearing plates. He said that mine left alone may last a long time but asked me to ask the community for your thoughts.
Has this been a problem with these earily motors. Is his idea of the later bearing a good fix. I checked with our local machine shop (356) and he has not done this for a 911. Your thoughts/ideas are This is my first 911 and looking forward to driving this car.
Bob
Nor Cal