267 The first Lincoln-Zephyr models of 1936 used a 267 cu. in. (4.4 L) engine which produced 110 hp (82 kW). This engine was upgraded with hydraulic lifters in 1938 and produced for one further year. 292 The engine was enlarged for 1940 and 1941 to 292 cu. in. (4.8 L). This engine was reused from late 1946 through 1948 and was the last of the line produced. 306 A single month of 1942 production used a 306 cu. in. (5.0 L) version of the engine. This was resurrected after the war in 1946 (with 7.2:1 compression and 2-barrel {twin choke} carburetor, rated at 130 hp {97 kW})[2] for a short time before reverting to 292 cu. in. for the rest of 1946 through 1948. The reason for the reversion to the smaller size was that the cylinder walls on the bored-out engine were found to be too thin. Many disappeared altogether in the block casting process at the factory causing many blocks to be scrapped before installation. Cylinder wear in the field was extreme, and re-boring during engine overhaul was impossible. The date code on the intake appears to be November 22, 1945. Is there a serial number stamped on the bellhousing or anywhere else on the block, it may assist? Someone else should know how to date code the heads? Also check out the carburetor tag
The Jalopy Journal
