The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Correct "stock" rotors & calipers for CPP modular drop spindles?

**WorldsCrappiestTruck** · 05-10-2022, 12:45 PM

1968 C10

Driving myself nuts here with the search, Googles and Rockauto trying to find part numbers, etc.

I have a set of CPP modular drop spindles CP30106-2 (63-70) and the caliper brackets (6087DBK).

Factory lower control arms, POL tubular upper control arms.

All of these parts came as a package deal on an unfinished project, so it's sausage-making a bit....

Calipers are GM 18003532 / 18003533 which I find fits a mid-80's C20 (among others).

Rotors, I was an idiot and threw away the boxes before taking a photo, but they measure approx. 1.25" thick, contain the wheel studs, are 6-lug, and use A-3 / A-5 bearing sets.

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The problem I'm having, is the rotor and caliper w/pads doesn't line up, no matter how I orient the slightly-bent caliper brackets. Thinking I have incorrect rotors, but given the spindles were for a pre-71 C10, the calipers I have are for a mid-80's C20....and rotors of unknown descent don't line up, I'm confused.

Also working on getting pics loaded for visibility.

Thoughts?

05-10-2022, 12:45 PM	#1
WorldsCrappiestTruck Junior Member Join Date: Mar 2022 Location: Hinesburg Vermont Posts: 45	Correct "stock" rotors & calipers for CPP modular drop spindles? 1968 C10 Driving myself nuts here with the search, Googles and Rockauto trying to find part numbers, etc. I have a set of CPP modular drop spindles CP30106-2 (63-70) and the caliper brackets (6087DBK). Factory lower control arms, POL tubular upper control arms. All of these parts came as a package deal on an unfinished project, so it's sausage-making a bit.... Calipers are GM 18003532 / 18003533 which I find fits a mid-80's C20 (among others). Rotors, I was an idiot and threw away the boxes before taking a photo, but they measure approx. 1.25" thick, contain the wheel studs, are 6-lug, and use A-3 / A-5 bearing sets. ----- The problem I'm having, is the rotor and caliper w/pads doesn't line up, no matter how I orient the slightly-bent caliper brackets. Thinking I have incorrect rotors, but given the spindles were for a pre-71 C10, the calipers I have are for a mid-80's C20....and rotors of unknown descent don't line up, I'm confused. Also working on getting pics loaded for visibility. Thoughts?