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#1
06-08-2007, 06:54 PM
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Rope seal blocks and alternatives
Did all blocks come machined from the factory to use a rope seal? I have a '66 421 block but the groove doesn't look wide enough for a rope seal.
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#2
06-08-2007, 06:58 PM
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just have to use the correct one!Tom
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#3
06-08-2007, 10:23 PM
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The blocks with 3.25" mains like your 421 use a narrower rope seal than the 3" main blocks.
Quite a few blocks have been cracked in that area (the back end of the seal area cracks out) from trying to use the 3" seal in a 3.25" block.  
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#4
06-09-2007, 03:08 AM
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The groove looks v-shaped (not u-shaped like on my 3" main block) and too narrow to fit a rope seal. There was a plastic seal in there when i took it apart. When it goes back together, I would like to use the graphite rope seal by Best Gasket or a NOS asbestos seal.
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#5
06-09-2007, 03:17 AM
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I probably have a NOS seal for ya. I'll check in the morning and let you know.
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