85 K20 Clutch Master Cylinder Fitting Size?

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Bigredisb

Junior Member
Joined
Oct 20, 2020
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Location
Wisconsin
First Name
Ted
Truck Year
1985
Truck Model
K20
Engine Size
5.3
Hello all. I am looking for some info related to the Clutch master output fitting. I am running a LM7 adapted to a SM465 and with the swap I need to run a hydraulic throwout bearing.

That said I am trying to find a adapter fitting out of the clutch master to a male -4an fitting but locally I cant find anyone that can match up the fitting. Appears to be about 7/16 in diameter but its a deeper bore than a typical brake line inverted flare type fitting.

Anyone have any ideas or suggestions?
 

BKING33

Full Access Member
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Aug 24, 2020
Posts
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Location
York Springs, PA
First Name
Brian
Truck Year
1987, 1989
Truck Model
K30, Suburban
Engine Size
6.2, 6.2 turbo
Fitting size on master cyl is metric M12x1.00. I used a 3AN line for my clutch. Bought my fitting from summit racing I think.
 

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