1942-1947 74 cu, large port replica Knucklehead cylinder head set ( blank set ) Head set include valve seats ( not cut ), Manifold screw and plunger installed.  The heads have all fins like original and can be completed with closed Rocker cups and tins only!
Brand is manufactured by Motortechnic Mfg. in Germany
NOTE:
Uses 1-3/8" large hex 18mm plugs.