3/4 ton and 1/2 ton Hard brake lines the same?
 

I’m in the process of replacing the brake lines on my 87 R20 Suburban.
I only need the front lines. I contacted LMC and they said they could not guarantee their 1/2 ton lines would fit my 3/4 ton truck. Would they be the same? I am talking about the pre-bent hard brake lines from the proportioning valve to the rubber brake hoses.

Re: 3/4 ton and 1/2 ton Hard brake lines the same?
 

The prop valve is in the same spot (drivers front corner of the splash apron/x-member) & the lines connect through the frame in the same areas so if I were betting I would say they will work.

Re: 3/4 ton and 1/2 ton Hard brake lines the same?
 

Likely the same diameter hardline and fittings. The length of the hardlines and the hoses may be slightly different.
The difference in the systems is the booster, diameter & stroke of the master cylinder, diameter of the caliper pistons, and diameter of the wheel cylinder pistons.

If the LMC lines are steel I'd look in another direction.
You want Stainless or Ni-Copp line.

Re: 3/4 ton and 1/2 ton Hard brake lines the same?
 

They are the same.

Re: 3/4 ton and 1/2 ton Hard brake lines the same?
 

Thank you everyone for the help.
This forum is the best!!!!