Main Bearing Cap set, used.  Ford V-8 late 1936, 1937, 1938 Flathead for 2.398 diameter crank bearings.  Main big bores 2.570-2.571. You should expect to line bore these caps to fit your block; we have a library of used timing gears if needed to gain lash.  Buying a set gives you access to our main cap library at no extra cost except shipping both ways. Individual rear caps are available at $35 each, F/C for $30 each.