rear disc brakes prop valve

[gmc2313]

i recently installed a willwood rear disc brake kit. i also installed willwood master,vac booster and prop valve for disc/disc. do i need to remove the factory prop valve on the frame if im using the new one mounted to the master. truck is 75 K10 shorty stepside on 35's

 

[bucket]

Yes, it should get removed.

 

[PrairieDrifter]

Yep it is useless. Maybe hold onto it for some one though.

 

[gmc2313]

thank you i will remove it and put unions or run all new brake lines. appreciate the info!

 

[bucket]

thank you i will remove it and put unions or run all new brake lines. appreciate the info!

Iirc, that's how my '90 Suburban was setup. It had the rear abs and no prop valve under the radiator area. The rear lines just had a union and the front lines had a tee.