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I'm also sorting out mating the parking brake cables. I have regular cab/longbed GMT800 rear right & left cables (the cables off each brake may be a standard length & all the different body configurations get adjusted in the intermediate cable? Either way, I'm wondering if anybody might have...

If one finds a possible donor in a salvage yard & the axles were gone, the RPO code associated with disc/disc is JF9. I have messages in to a few dealers to confirm they actually have stock. Lots show a listing for this part number but have no inventory.

That part # shows up as fitting the C3500HD, disc/disc P30 chassis vehicles, & one specific subset of Tahoes & Cadillacs. Finding one will be the trick. Might be in someone's new old stock inventory, or have to find in a boneyard.

I stand corrected. May have found part numbers for a disc/disc combination metering/prop valve designed for the Kelsey-Hayes EBC310 ABS the combination valve we're discussing mates to. Looks like there were some GMT400 bodies Police Tahoe, P30 van disc/disc, and maybe some GM motorhome...

I think the early C3500HD's had a height sensing valve (limits rear pressure rise more when no load on rear, riding higher). Not certain if that continued when they got the Kelsey Hayes 4WAL abs system. BigT - I believe '95+ C3500HD's got 4WAL and a good search term is "combination valve." If...

I like the crushable tubing for a safety valve in case your foot's still on the pedal at spring bind :)

Posted wrong pic before. This is an example of the rolling setup at around 18,500 lbs.

If needed, that is the type of proportioner I've used before. But I need to see if adjustment is needed, & then better understand how the stock proportioner is fit (incorporated into antilock?). As background on what brought me to this point, my truck's rearend is worn & needed new...

You're correct to consider each of the points brought up above. That approach is why I decided to do the work to swap pedal rods & modify the firewall mounting plate so I could fit the hydroboost & mastercylinder combination that matches the two piston front/rear brakes. The proportioning...

If you go that far, go all out, & pull the parts from a GMT800 6.0 gasser truck. You get the modern 2 piston disc brakes/bigger rotors (gotta ream knuckles to fit GMT400 balljoints & a different outer tierod end). You can weld, so welding in new spring perches & overload bumpers at the...

Here's a pic of the newer AAM 10.5/14 bolt with disc brakes next to my truck's original Corporate 10.5/14 bolt with drums.

Here is a link to the instructions that go with the kit to sleeve the coolant passage between the valves. If this kit can be ordered/shipped to your location, it might be a good option. https://www.goodson.com/technical_support/instructions/Cylinder_Head_Rebuilding/DCR-62-KIT.pdf

Yep, seals (or ensures it remains sealed against future cracks) the water jacket. It's not uncommon for cylinder head shops that do a lot of 6.5 heads, to, pro-actively, drill all those passages & punch in the valve guide inserts - to eliminate comebacks/future problems. A well respected...

The table & footswitch really multiplies the usefulness of the portaband. The table is one of those tools that after you use it, you wonder how you ever got along without it. The Incra V27 precision miter is a good addition to the table. It makes repeatable angle cuts easy. That V notch...

After finding those gauges install instructions online, I don't think the PWM LED dimmer will work for Glowshift gauges. Was mistakenly thinking they would have a separate lighting power wire like my Autometers. Guessing the +12v headlight on input just triggers their internal 30% dimming circuit.

If you mean the one for ~$7-8, that's the one I was thinking to try as it's not too expensive an experiment. I suspect if the LED gauge bulbs are dimmable, it'll work.

My Autometer LED lit gauges use the special Autometer dimmer to vary light output the degree you want. Stock dimmer lowering voltage would dim a small range, but not as much as you want. I think it does the dimming by pulse width modulation...

This kind of thing is precisely why I kept discussing Holset's years back when the 6.5 community was just starting to look at turbo options. Experimenting with Holsets or Holset CKO's is relatively easy, cost-effective, and considerable options. Looking forward to seeing how you like this...

I'd guess the question about using larger valves is long-term head durability/cracking btwn the valves? Wasn't that GM's logic? Started with larger valves in less stressed, N/A 6.2 application. With turbocharged, 6.5 application valves got smaller leaving more material in the head btwn...

The 2 bolts that hold the caliper to caliper bracket. You can pull the lower bolt & pivot the caliper out away to swap pads. The rear brake lines after the ends of the hose in the picture convert to a metal lines going to near center of diff, then T's into one & converts to hose up to chassis...