273 commando Build

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Pics 4.140 bore and 0.041 NOT compressed.

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stroker402 said:
I seen some sb mopar new gaskets on ebay with about the same measurements as the ones I just purchased. I have 2 pairs of head gaskets now . just have to see which ones I will use ...... the oem or mr gasket 1121g 's. bore size vs thickness is the question.
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Use the ones with the smallest hole for maximum compression...
 
Well that sucks. Sorry you were mis informed about your purchase. They do look like they are nos with correct part numbers and packaging but are definitely not steel shim or small bore. Can you return them?
 
toolmanmike said:
Well that sucks. Sorry you were mis informed about your purchase. They do look like they are nos with correct part numbers and packaging but are definitely not steel shim or small bore. Can you return them?
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I can return if I want . since these nos gaskets have the smaller bore this would probally be the better choice what do you think tmm ?
 
soon as it warms up here again it's back to the garage again. time to slide the Isky cam in next .
 
toolmanmike said:
Well that sucks. Sorry you were mis informed about your purchase. They do look like they are nos with correct part numbers and packaging but are definitely not steel shim or small bore. Can you return them?
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I read somewhere that you never want the head gasket bore ring to come close to the edge of the cyl bore.
 
stroker402 said:
I read somewhere that you never want the head gasket bore ring to come close to the edge of the cyl bore.
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That makes sense. I never saw the original bore dimensions of the originals. Like a dumb azz, I threw mine away.
 
stroker402 said:
I read somewhere that you never want the head gasket bore ring to come close to the edge of the cyl bore.
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You need to make sure that there's enough clearance so the piston won't hit it...
 
stroker402 said:
here are the pics

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I think these head gaskets are what was on my first D/Dart. On my tablet, I measured the silhouette left on my block with the bore set at 3.63. The seal ring was just about 4.00. The material looks like it would compress quite a bit. So I'd say the NOS gaskets that you just got are the correct ones. The 1198 stamp must be the date code ... 119 day of 1968?

Just did a check on the head gasket on "The Politician" and it's just metal and about 0.023". Just enough of it was sticking out of the front to mic it.

Did a part number check on MyMopar of the 2536757 head gasket and nothing came up. They have a database of over 120,000 Chrysler part numbers.
 
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This has been a very interesting conversation about original head gaskets. Stroker402 needs to continue building his 273 with the gaskets he has and may be someone will take a virgin 273 apart that has steel shim gaskets and we can get a bore measurement and put the myth to rest. I will be excited to hear this thing run. The cam is like the E-4 but more lift. Don't forget videos.
 
Barracudadave67 has steel head gaskets that came off his 66 barracuda Formulas S. For some reason unknown, they are very distorted near the valve areas as you can see in the pics. Also the bore size of gaskets is larger like all the others we have seen . not 3.636" bore size .
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barracudadave67 wrote > Here is a pic of the steel shim gaskets, for the 273 HP. They mic out at .0245-.025, This is on one, or two of the clean spots. The center tab has a PN of 2536757, and the right tab has a# of mc 6681, verticlaly, on it.Hope this helps.
 
toolmanmike said:
This has been a very interesting conversation about original head gaskets. Stroker402 needs to continue building his 273 with the gaskets he has and may be someone will take a virgin 273 apart that has steel shim gaskets and we can get a bore measurement and put the myth to rest. I will be excited to hear this thing run. The cam is like the E-4 but more lift. Don't forget videos.
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Thanks tmm !
 
toolmanmike said:
This has been a very interesting conversation about original head gaskets. Stroker402 needs to continue building his 273 with the gaskets he has and may be someone will take a virgin 273 apart that has steel shim gaskets and we can get a bore measurement and put the myth to rest. I will be excited to hear this thing run. The cam is like the E-4 but more lift. Don't forget videos.
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I have a couple of commando 273's that I haven't torn down yet... Not sure if they still have the stock head gaskets or not...

I don't know when I will get around to tearing them down, but this thread has me wondering.... :BangHead:
 
krazykuda said:
I have a couple of commando 273's that I haven't torn down yet... Not sure if they still have the stock head gaskets or not...

I don't know when I will get around to tearing them down, but this thread has me wondering.... :BangHead:
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Yes !
Mopar never did have a set plan on things . They always had to change things just a little bit so nothing fit the next later. go figure .
 
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