'68 GMC 4500 Front Axle Troubles

The king pin ripped out of the end of the axle of my 1968 GMC 4500 box 
truck.  Luckily I was going only 1 mph so no catastrophe.  The Axle had 
been resleeved just 2 months before  which may have weakened the 
surrounding metal....  40 years old and  almost 400,000 miles,  I can't 
understand why it should be worn out     ....  The problem is where to 
find another Axle

This is a 16'box truck with dual rear wheels, 16,000 lb G.V.W. and a  
V6-351 engine,

It is an EM 4500  with a 4000 lb front axle.  I believe it was called a 
FO40 solid beam front axle.

The casting number on the axle is GM 3913707

The distance between spring centers is 32"

The spring width is 2.5"

The distance between the king pin centers across the bottom is 65"

The nut from the drag link  to the steering arm on the spindle  faces up.

Any suggestions of where to find an axle which would work in this 
truck... or where to find a whole new front end which would fit would be 
greatly appreciated.

Thanks

Jon Lathrop


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Jonathan Lathrop           Have Truck Will Haul Moving Service
Riverdale, Maryland    Careful Courteous Reasonable Reliable
jonathan@[EMAIL PROTECTED]
        http://jonathan.lathrop.com
Phone: 301-779-7190               Cell: 202-352-8549