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rotorwrench · 02-27-2020, 02:43 PM

The green bible only lists the replacement parts that were used in the 1948 time frame. The 51T number is a 1945 number that has a 41A (221 cid) engine size connotation which is kind or rare for post war. Most vehicles made starting in 1945 had the 239 cid connotation of 59A. The prewar number up through 1941 was 81C-13833. This number comes from the 1938 thru 41 chassis parts catalog. It would have been for the 1/2 ton up through 1-ton with the correct bracket to install it. The brackets are listed separately.

That's the only thing bad about the green bible is that it doesn't give the old numbers unless they never changed. If they changed then the number changed too. Ford started production of trucks early in 1945 and they may have had 221 engines in them to start out with (41A block). The 1945 trucks were the first civilian vehicles made so that farmers could replace their war weary vehicles. Automobile production started later on July 3, 1945.

02-27-2020, 02:43 PM	#10
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: Horn for a 39 1 ton truck. The green bible only lists the replacement parts that were used in the 1948 time frame. The 51T number is a 1945 number that has a 41A (221 cid) engine size connotation which is kind or rare for post war. Most vehicles made starting in 1945 had the 239 cid connotation of 59A. The prewar number up through 1941 was 81C-13833. This number comes from the 1938 thru 41 chassis parts catalog. It would have been for the 1/2 ton up through 1-ton with the correct bracket to install it. The brackets are listed separately. That's the only thing bad about the green bible is that it doesn't give the old numbers unless they never changed. If they changed then the number changed too. Ford started production of trucks early in 1945 and they may have had 221 engines in them to start out with (41A block). The 1945 trucks were the first civilian vehicles made so that farmers could replace their war weary vehicles. Automobile production started later on July 3, 1945.