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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

flat 8 numbers

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Old Aug 11, 2019 | 10:50 PM
  #1  
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flat 8 numbers

My F68 has a flat head 8 that is stamped made in Canada 8BA. The firewall tag provides the Engine number 8J-1008
I have been researching the engine and getting mixed results.
First, is this a 1948 engine as some data suggests the 8BA was a 1949 engine and that the truck should have been labelled an 8RT (I know they are essentially the same)?
Does the engine serial number tell me anything more?
 
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Old Aug 12, 2019 | 12:40 AM
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8 says it was 1948 239 late series engine
J means it came with the 4 spd trans

8RT was just a designation on some accessories - heads for instance
The 8BA series started with the 48 trucks, Jan 16, 1948

That's about all there is to know.
 
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Old Aug 12, 2019 | 03:10 PM
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8RT is a heavier cast truck engine . Weighs 570 lbs.
 
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Old Aug 12, 2019 | 09:18 PM
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Where do you get that info? Just curious cause I've never seen that published.

All 8RT/BAs weighed 569
Earlier V8s listed at 525

I wonder if you're thinking of the 337 flathead from F7 and F8 trucks. I've heard it weighs a couple hundred pounds more...
 
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Old Aug 12, 2019 | 10:06 PM
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There is no such thing as an 8RT block, they are the same as 8BA's. 8RT heads have a little thicker deck surface, according to some sources.
 
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