The casting number on the head is: 640161.
One of the harder parts of restoring older Willys is finding all the right restoration parts. Sometimes you get lucky and find a part in a junkyard. The cylinder head for a 41-53 Willys L-Head has been one of the more difficult parts to find in recent years, but not anymore. Omix-ADA has made the investment in re-tooling this engine head to original specifications. After two years of development, this Willys cylinder head for the 134CI L-Head engine is an exact reproduction of the original. This includes the markings for the proper firing order in the casting and the Willys logo.
Available as a MOPAR Authentic Restoration product, you know your restoration is one step closer to being completed.