This may be helpful:
http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0523.htm

The holes that go through the MC are for the mount bolts. Two of them just about the middle up and down. The bolts go through the frame and into a plate that is threaded. It is all straight forward when you get it clean and apart. Take the lines off, Remove the push rod, take put the two bolts and it will be in your hands.


Steve H