C4 or 1LE on drum spindles?

Discussion in 'The whoa and the sway.' started by sporty-to-GN, Jan 24, 2021.

  1. sporty-to-GN

    sporty-to-GN Well-Known Member

    I want to convert my pop's '68 Cutlass to front discs and I'm looking for clarification. Can I use the drum spindles (bolt boss removed), tall ball joints, 1LE rotors, 68-72 calipers/pads, and 15" wheels? I might be able to scrounge up some 16"s.
    Use the drum spindles, drum hubs, tall joints, C4 rotors/calipers/pads? Also wondered about the C4 rotor hat thickness and stock studs.

    Will doner backing plates fit?
    Last edited: Jun 23, 2021
  2. 72gs4spd

    72gs4spd Well-Known Member

    Master Power Brakes make a bracket that mounts to the steering arm bolts on the spindle so you can use your drum brake spindle. I was thinking of buying them to see if I could get a larger rotor up from and retain my Wilwood 2 piston calipers when it’s time for new brakes or I need something to do.
  3. alvareracing

    alvareracing Well-Known Member

    call Kore3, they were very helpful in matching things up for me. Plus they carry every thing if needed. Brakes is their specialty!

  4. sporty-to-GN

    sporty-to-GN Well-Known Member

    Cool, thanks. I'll check them out
    knucklebusted likes this.
  5. knucklebusted

    knucklebusted Well-Known Member

    Please update us when you get it sorted to help others.

    I'd love to see pictures when you are done. I have a Right Stuff on the rear and it rubs on factory chrome wheels so I'm always wary of "works with most 15" wheels" statements.
  6. newmexguy

    newmexguy Well-Known Member

    You might look up the '98-'02 F body four wheel disc conversion onto older GM AFX cars. A individual in Tucson, who has been a site moderator has done that swap. Do not know why just the fronts could be swapped. Personally I had thought in the past, about buying those systems, from the yards for resale, but just like anything else, the weight and shipping kills the deal.
  7. sporty-to-GN

    sporty-to-GN Well-Known Member

    I'm finally revisiting this project. I picked up some Pontiac G8 18" wheels with decent tires and did a little more research on Kore3, CPP, and Master Power brakes. (The wheels are 5 on 4.75 but will need 2" spacers to get to about 4.5" BS and pilot holes hogged from 69mm to our 70.3mm)

    CPP booster/MC combo and a CPP proportioning valve p/n CH32552BK are on the way from OPGI. This valve is supposed to be disc/drum and disk/disk compatible.
    I really like the C5 adapting knuckles from CPP, p/n CP30013. They're $269 from Summit. CPP's whole C5 13" kit is a bit pricey at just under $649+tax/shipping so I'm going to try pricing the individual components through my local jobber/work account and other online sources, we'll see.
    The C5 hub assembly design and CPP's sales pitch is appealing to me, even though for years I've been cussing the common failure of hub bearings in modern cars and their tendency to weld themselves in place w/corrosion. Last week a guy in our shop broke the lower control arm off an Explorer with an ATD-8629,
    designed to remove stubborn hub assy's.

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