1986 GMC LS SWAP. What size are both fittings in the steering gearbox? I need 6AN for both

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Nasty-LSX

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I called HOLLEY, CPP, and a few other companies with no luck. No one knew the port size for pressure and return fitting! I only need fitting sizes for gearbox.

:oops: Does any know the size of these 2? I need 6AN fittings Thanks.
 

Nasty-LSX

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So I have one person telling me They are 11/16x18 and 5/8x18 Does this sound right?
I thought they were MM (METRIC) thats why Im insure.
 

yevgenievich

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Metric O ring style if for 86
 

yevgenievich

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M16-1.5
M18-1.5
But takes an oring to seal
 

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Nasty-LSX

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HOUSON TX
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Mi Hung Lo
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c10/k10/k20
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M16-1.5
M18-1.5
But takes an oring to seal
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yevgenievich

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Worth checking to verify if current hoses used oring. Parts get swapped around
 

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