Are you installing oversize throttle shafts or trying to rebush the carb body?
Car Model MGB
I'm looking to replace originals with new bushings. No oversized shaft.
Car Model MGA 1600
I have a small assortment of reamers. I'll see if I have a 5/16" reamer that would work.
I have a 0.313" machine reamer but it does not have pilots on both ends. It is 6" long. I don't know how sharp it is.