I considered this swap on my '52 3600 and like
TooMany says it will be a direct bolt in swap.
1/2 tons and 3/4 tons used the same front springs from 47 to 55. Also of note...1/2 ton axles used 1/2" u-bolts while 3/4 tons used 9/16" u-bolts.


Steve

'49 3800
'52 3600
'57 3100