340 R vin decoding

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R

rt7413

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I have a 67 barracuda coupe witch had a 273 . Now it has a 340 just wondering what 340 I got here some of the #drivers side on sided of block 2780930-340-6 ! Drivers side front of block just below head 340R 37440124 I think it says last cpl digits hard to read ?? Passenger side is 06/16/71 must be manufacting date ?
 
6/16/71 is the casting date of your block.
3744 is the build date 10/28/71
0128 is the unit built that day

Happen to have the vin on it. pass side just below a drain hole and above pan rail.

And it IS NOT a 6 pack block...
 
So would it have the 71engine specs such as steel crank or the 72 cast ???:violent1:l
 
crackedback said:
6/16/71 is the casting date of your block.
3744 is the build date 10/28/71
0128 is the unit built that day

Happen to have the vin on it. pass side just below a drain hole and above pan rail.

And it IS NOT a 6 pack block...
Click to expand...

Hi Crackedback, just wondering what or how you decoded
the build date and unit number? do you have a chart or sheet
you could post or would be willing to share? Thanks either way.
Wheels.
 
By info I have found on the Internet doesn't sound like they went to cast crank till spring 72 ??? But wonder if I got 10.5 comp or 8.5 ???
 
I've had 71 date cast 340 blocks with a 73 build date so the casting date is not a good indicater of weather it is a steel or cast crank. Should be able to tell by the balancer.
 
Ya according to crackedback that other # I have is assembly date 10/71 ?
 
Wheels said:
Hi Crackedback, just wondering what or how you decoded
the build date and unit number? do you have a chart or sheet
you could post or would be willing to share? Thanks either way.
Wheels.
Click to expand...

The eight digits 37440124 break down as first 4, 3744, are 10,000 day calendar date and the last four, 0124, are unit built that day.

Website with 10,000 day calendar.
http://maxwedge.com/articles/10k.php

I put 0128 in the first response... Oops!

If the stamping is really an R and not a P, then it would be a low compression engine. The R designates regular grade fuel.
 
crackedback said:
The eight digits 37440124 break down as first 4, 3744, are 10,000 day calendar date and the last four, 0124, are unit built that day.

Website with 10,000 day calendar.
http://maxwedge.com/articles/10k.php

I put 0128 in the first response... Oops!

If the stamping is really an R and not a P, then it would be a low compression engine. The R designates regular grade fuel.
Click to expand...

Thanks , I did not know that even existed. Very cool , I like learning new
stuff. Again thanks.
 
Ok thanks guys ! I am not even sure what has ever been done to the motor I have only had it for few yrs never been apart was just wondering witch one I had it runs like a top just debating on if going to tear it down or not ?? Guess will do compression test and go from there ?? . Just been slowing working on car but it kinda kicked in to high gear now
 
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