Main Bearing Cap set, each cap is different.  Ford V-8 1949, 1950, 1951, 1952, 1953, USED.  Main big bores 2.670-2.671.

You should expect to line bore these caps to fit your block.  Buying a set gives you access to our main cap library at no extra cost except shipping both ways. 

Individual caps are available at $20 each.