Shouldn't make any difference Julian, '47 to at least '55 1st. 3604. Also Chevy
and GMC should be the same.
Mine Old Blue happens to be a '50 by the way which is 42.5", as is the '47 GMC
that is in the picture below.
The spring center line can only be two widths using the stock .5" spacer washers.
its either 42.5" or 41.5". That is arrived at by taking the frame width, 36" plus the
distance from the frame to the inside of the hanger opening, 1.75" (twice) then adding
1" to each side for the leaf center line, if you were to putting the springs in with the
spacers on the outside and that wold give you 41.5", Shift the spacers to the inside
and you have a spring center line of 42.5" which matches the spring pads on the
HO52 axle housing..
Now....the most accurat way to measure the center line of the 2" pads welded to the
housing, is to drop a plum line from the (inside or outside) edge of the pads making
a mark on the floor and then adding or subtracting 1" to that for the center line. That
will be 42.5".
http://www.pbase.com/dennygraham/image/166182159Denny Graham
Sandwich, IL
