01-28-2011, 03:53 PM | #1 |
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Block ID
Just picked up a block yesterday. This came out of a 1939 1 ton truck. The center holes (top triangular and the bottom two round) would indicate a 45-48 block but it is a 221 engine which would indicate a 1939 era block. It has 59 on the top of the bell housing. The exhaust manifolds also look like the later engines. Were the truck engines different in 1939?
No cracks in the usual place and it has standard pistons so hope this one will build. The second set of pics are the heads that came on it. One head has an A in the casting and the second has a T. Did the large trucks have different heads? Thanks guys. Ed Last edited by Ed Pitts; 01-28-2011 at 03:55 PM. Reason: spelling correction |
01-28-2011, 04:00 PM | #2 |
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Re: Block ID
I believe blocks like that are 41A replacement block (see '28-48 parts book) that were 221's made on postwar tooling to fill the huge replacement parts market after WWII. No production use, just a replacement part. One prewar truck head, one passenger!
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01-28-2011, 06:55 PM | #3 |
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Re: Block ID
Thanks Bruce. That makes sense about the similarity with the later blocks since the only difference was the bore. I assume that this would be a good block to have?
Is there any difference between the truck head and the passenger head? Thanks, Ed |
01-31-2011, 05:54 PM | #4 |
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Re: Block ID
Spec says roughly 4CC more room in the truck head. Both heads are very common and cheap at the fleas.
41A generally is found to have smaller cylinder castings than its 59 parent, capable of boring to 3 3/16 but not the huge sizes possible with a 59A. |
01-31-2011, 07:59 PM | #5 |
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Re: Block ID
look very closely and see if there are sleeves in the block. 59 denotes the 42-48 block but if it was rebuilt in the late 60's or about then, Ford rebuilders were using up what was left over. I have a 41 engine that was sleeved back to original bore size and had a rebuilders tag turned back side up and there was a ID number, no specs as to crank journals, etc
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01-31-2011, 08:10 PM | #6 | |
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Re: Block ID
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Quote:
Thanks, Ed |
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01-31-2011, 08:18 PM | #7 | |
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Re: Block ID
Quote:
Ed |
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01-31-2011, 08:22 PM | #8 |
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Re: Block ID
59A heads go right on earlier blocks, early heads on late blocks actually usually need minor relieving over valves to clear; the overhaul book covers all this AND the recommended use of late gasket in all combinations with monor mods. '37-48 engine book is readily available in reprint.
The specs say 59A-B heads 73.5-75.5, the earlier 59A heads 77-79. 81A 77-79. All numbers should be treated with skepticism until measured. |
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