OEM Brake line/fitting sizes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

guy0783 · 09-20-2017, 01:22 PM

So I've been working on the truck it's a 63 3/4T K20. It got some new pushrods, a rear pinion seal, plugs, wires, hoses, fresh fluids, etc...

After replacing the brake master cylinder, I have a seeping leak where the line connects to the master. I just discovered it at lunch as I made a point to check and recheck it. I figure I might as well replace the line, but can't find the line size or fitting sizes. I've seen some threads on brake line, but am mostly seeing disk brake conversion info.

Anyone know the OEM sizes?

09-20-2017, 01:22 PM	#1
guy0783 Registered User Join Date: Aug 2017 Location: Cushing, Ok Posts: 28	OEM Brake line/fitting sizes So I've been working on the truck it's a 63 3/4T K20. It got some new pushrods, a rear pinion seal, plugs, wires, hoses, fresh fluids, etc... After replacing the brake master cylinder, I have a seeping leak where the line connects to the master. I just discovered it at lunch as I made a point to check and recheck it. I figure I might as well replace the line, but can't find the line size or fitting sizes. I've seen some threads on brake line, but am mostly seeing disk brake conversion info. Anyone know the OEM sizes? Attached Images



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