[cal30_sniper]

I'm not 100% certain, but I believe the "JD8" might refer to the larger brakes that were available on some 1-tons. I'll have to check the RPO sticker on my K30 when I get home. I do know that the JD7 brakes on my '86 C20 Suburban (13x2.5" rear drums) are different than the brakes on my '86 K30 Crew Cab (13x3.5" rear drums). I haven't gotten the front end apart to see if the rotor size or caliper are different yet. I'm running the JD7 hydroboost with a master cylinder from an early 2000s 8-lug Chevy van, and have found that to be a really good combo. I went with the van master cylinder, because it had a reservoir about twice as large as the normal plastic squarebody master cylinder, and it was cheap in the salvage yard I was crawling through.

I'm planning to swap the larger rear drums over to the 14 bolt that is already under my C20 Suburban when I do the 4x4 frame swap. I'll swap over the front brakes also if they're beefier, or maybe do the '09-up Ram 3500 front disc swap on the Dana 60 while I'm at it. Still looking into whether or not that will fit into my 17" H2 rims.