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airdale94 · 05-28-2014, 11:54 PM

Ideally you want 3/16" diameter with front disc and 1/4" for rear with wheel cylinders. The reason I was told was with front disc it's not the volume you need but the pressure. Smaller line, higher pressure. With the rear you don't need the pressure but want the volume. With that being said I just swapped a 14 bolt out of a early 80's and had to use 3/16'' to connect the wheel cyls. so... I would keep the 3/16 because I don't know that they ever switched to 1/4 on the front.

05-28-2014, 11:54 PM	#2
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: Can anyone check 3/4 ton disc brake line size for me? Ideally you want 3/16" diameter with front disc and 1/4" for rear with wheel cylinders. The reason I was told was with front disc it's not the volume you need but the pressure. Smaller line, higher pressure. With the rear you don't need the pressure but want the volume. With that being said I just swapped a 14 bolt out of a early 80's and had to use 3/16'' to connect the wheel cyls. so... I would keep the 3/16 because I don't know that they ever switched to 1/4 on the front. __________________ 68' C20. 283CI w/55CC 305HO heads, NP435 Close Ratio, Corp. 14 bolt FF 3.21, 75' front end swap (everything but the X-member).