Welcome to Stovebolt! Before getting too much deeper into your question, I think it will help to move your thread to the Big Bolts forum as that's the best place for help with your particular truck and brake system. Lots of other"Big Bolters" to chime in and offer the best help for your truck as the brake system is different than the 1/2 to 1 Ton trucks.

Will catch up with you in the "Big Bolts" forum. smile

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)