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Which FelPro one piece oil pan gasket

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Post  the tree man January 6th 2021, 11:52 pm

Anybody know the difference between the FelPro oil pan gaskets OS34600R and OS34507R? Both are listed for late model 460 but is will they both work on my 72 block? I used the M-6017-a460 last time but it's not available locally. Thanks.

the tree man

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Post  Wayne Pearce January 7th 2021, 11:53 am

Tree man:
I believe the OS34600-R gasket is for early applications, all 1/4" holes, except the corners which are 5/16". The OS34507-R is for late applications all holes are 1/4". The OS34600-R can be used for either application, that's what I did - worked fine.

Wayne (SAWDOFF) Pearce

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Post  the tree man January 7th 2021, 1:11 pm

Perfect. Thanks.

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Post  jasonf January 9th 2021, 12:04 am

Wayne Pearce wrote:Tree man:
  I believe the OS34600-R gasket is for early applications, all 1/4" holes, except the corners which are 5/16".  The OS34507-R is for late applications all holes are 1/4".  The OS34600-R can be used for either application, that's what I did - worked fine.

  Wayne (SAWDOFF) Pearce

Damn those are only $10 more then the regular multipiece one I just bought. I'd never seen the 1 pc.
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Post  norm January 9th 2021, 10:56 am

They came on the last generation 460's in the trucks. 1990's
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