Brake Lines Question: What's Diff betwn 3/4 and 1/2 Lines? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bddcustoms · 05-23-2019, 10:45 AM

Hey Board,

I have a 3/4 ton C20 project (1969). I've swapped in disc brakes all around (72 c20 up front, 76 caddy eldo in rear). It's still an 8-lugger but by no means intended as a work truck.

I'm about to order all new brake lines in stainless. Aftermarket only really offers lines for C10 1/2 model -- or at least companies like LMC identify what they offer as for 1/2 ton use explicitly. I can't imagine why 1/2 ton lines won't work.

Am I missing something?

Thx
BDD

**kwmech** · 05-24-2019, 01:46 AM

Not a thing.

bddcustoms · 05-24-2019, 11:55 AM

Thanks!

jgr · 05-24-2019, 01:50 PM

If you are going FROM drum front and back to disk front and back you have a few more things to consider.
The bore size on your master, proportioning valve, and line diameter according to bore size on your master; unless you have bought a kit where someone has that all figured out?

05-23-2019, 10:45 AM	#1
bddcustoms Registered User Join Date: Apr 2009 Location: Bowie, Maryland Posts: 80	Brake Lines Question: What's Diff betwn 3/4 and 1/2 Lines? Hey Board, I have a 3/4 ton C20 project (1969). I've swapped in disc brakes all around (72 c20 up front, 76 caddy eldo in rear). It's still an 8-lugger but by no means intended as a work truck. I'm about to order all new brake lines in stainless. Aftermarket only really offers lines for C10 1/2 model -- or at least companies like LMC identify what they offer as for 1/2 ton use explicitly. I can't imagine why 1/2 ton lines won't work. Am I missing something? Thx BDD __________________ broke d!@k dog Garage 1969 C20 - Project: "Big Sexy" [http://67-72chevytrucks.com/vboard/s...d.php?t=454894] 2003 'Burban - [Big Pop's daily driver] 1969 350/350 Stingray - [as soon as the economy turns...] 1939 Chevy Roadster Pick Up - Project: "Pre-School" (searching now)

05-24-2019, 01:46 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,684	Re: Brake Lines Question: What's Diff betwn 3/4 and 1/2 Lines? Not a thing.

05-24-2019, 11:55 AM	#3
bddcustoms Registered User Join Date: Apr 2009 Location: Bowie, Maryland Posts: 80	Re: Brake Lines Question: What's Diff betwn 3/4 and 1/2 Lines? Thanks! __________________ broke d!@k dog Garage 1969 C20 - Project: "Big Sexy" [http://67-72chevytrucks.com/vboard/s...d.php?t=454894] 2003 'Burban - [Big Pop's daily driver] 1969 350/350 Stingray - [as soon as the economy turns...] 1939 Chevy Roadster Pick Up - Project: "Pre-School" (searching now)

05-24-2019, 01:50 PM	#4
jgr Registered User Join Date: Apr 2016 Location: saginaw Mi. Posts: 70	Re: Brake Lines Question: What's Diff betwn 3/4 and 1/2 Lines? If you are going FROM drum front and back to disk front and back you have a few more things to consider. The bore size on your master, proportioning valve, and line diameter according to bore size on your master; unless you have bought a kit where someone has that all figured out?



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