Super55,
Jim Carter's MC's on that page are for the 1/2 ton trucks with the 1-1/8" bore. The 1-1/2 ton trucks use the 1-1/4" bore MC's.
If you MC is not pitted you can rebuild it with a kit from NAPA...if it is pitted you can send it to Serria Specility Automotive and have Joe put a brass sleeve in it. New MC's are hard to find for the big trucks.
Mike B
