chevy 1 ton axle question...

[aroising]

I've been in the process of switching over to 1 ton axles. I'm in a bit of a bind with the brake lines. Does anyone know the size of the brake lines and what fitting size they are? Its a 78 K2500. Anyone have any experience with any joints I should use and the best way to still maintain the toyota booster/master... Thanks for the help.

 

[Cruiserdrew]

So is this on a 14 bolt? Almost everyone does a disc brake conversion and then complains the original master does not move enough fluid. Marlin sells an upgraded larger bore master that many get to work, or you can do a chevy 1 ton master conversion. The fittings are 3/8 x 20? I think with 3/16 tube.

 

[megolfer]

I have a marlin master that I am selling for $90 that was one run on it. It is basically brand new. I am going a different direction. Let me know if you are interested.

 

[lehiguy]

I have a semi-floater 14-bolt with disks. I used the calipers from the front of a 70s Chevy 1/2 ton. These do require lots of fluid, so I switched to an MC form a T-100 that has a 1" bore. This helped, but there is still room for improvement. The cure, as I understand it, is to use the newer, smaller, metric calipers from an S-10 or something. You will need a proportioning valve too, but this is easy. You will need to ditch the stock residual valve which is part of the crud hanging from the front of your stock MC. Disks require very little residual pressure and you most likely won't need a residual valve due to the height of your rig creating residual pressure due to the height disparity between the MC and the calipers. I don't use them.

 

[mookie]

if you have power steering then think about going to pull-a-part and get a hydroboost master cylinder off of a late model mustang (like $50) it's easy to hook up and you'll have awesome brakes

 

[slacker24-7]

if ya go one ton master, ($39.00 plus adapter) avoid conversion bushings i have broken a couple, Auto zone as well as other parts stores have whatever ends ya might need ,just cut off old end put on new reflare and its done correctly. same for coming off your frame line, put a metric fitting on that end....