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Old 04-10-2024, 02:27 PM
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Ragtop Man Ragtop Man is offline
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Default Consensus pick for '67 power disc brake conversion from manual drums

Will be taking delivery of my '67 convertible soon - and am formulating plans to 86 the manual drum brakes and dodgy bias ply Wide Oval repro tires (15 y.o.)

I'm not autocrossing, but do plan on some longer freeway jaunts once I've got it where I want it.

Have not settled on a wheel tire combo, would prefer to stay stock (car is a very good survivor with nice patina) perhaps with the later 11" discs.

Thoughts and recommendations welcome!

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Old 04-10-2024, 07:13 PM
gtospieg gtospieg is offline
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Back in the day I drove my 67 Tempest with a 69-72 disc brake set up. It should be more than adequate for your stated needs. Plenty of aftermarket kits available.

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Old 04-10-2024, 07:18 PM
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I would determine what wheel you are using first - it defines what you can use.

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Old 04-11-2024, 01:04 PM
Cammer-6 Cammer-6 is offline
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I will add to that,the rear disc brakes on my 97 Firebird required 2 minutes with a file on the caliper fins for a 15 inch snowflake to fit.

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Old 04-11-2024, 01:05 PM
Goatracer1 Goatracer1 is offline
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You should still be able to find disc brake up through 1972 "A" body or 1969-72 GP/Monte Carlo front spindles with steering knuckles then you can use all factory parts.

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Old 04-11-2024, 03:04 PM
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^^^ the stock 67 drum rims will most likely NOT clear the OEM 69-72 A disc setup.

This is an excellent time to go 15" or bigger.

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Old 04-11-2024, 03:51 PM
gtospieg gtospieg is offline
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I used stock(not on 67) 14x7 Rally II's on my 67 with the 69-72 disc set up.

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Old 04-11-2024, 05:07 PM
Cammer-6 Cammer-6 is offline
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Quote:
Originally Posted by gtospieg View Post
I used stock(not on 67) 14x7 Rally II's on my 67 with the 69-72 disc set up.
ditto on that with my 67 14x7 Rally II

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Old 04-12-2024, 10:50 AM
Joe-Touring Joe-Touring is offline
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This may be a bit over your performance aspirations, but I think this Wilwood kit is tough to beat if you’re keeping a small wheel.

I’m currently running Kore3 C5 Corvette discs all the way around, I’m happy with the performance, but I’m limited to running 17 inch wheels. If I could do it all over I would lean toward the Wilwood stuff.

I also prefer keeping a non-powered setup. Pedal feel is great, more space to work under the hood, and you don’t have to worry about a big cam killing your vacuum

https://www.wilwood.com/BrakeKits/Br...+Brake+Spindle

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Old 04-12-2024, 07:55 PM
66sprint6 66sprint6 is offline
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It's never been easier to do, new or used. The easiest and most economical way is a disc brake setup from a '69 to '72 A body. The whole thing literally slips in between the upper and lower ball joints. I don't know about '69 and up performance, but our '67 with the disc brakes and rear drums stops as well as any street car without ABS that I drive.

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Old 04-12-2024, 08:16 PM
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Quote:
Originally Posted by Joe-Touring View Post
This may be a bit over your performance aspirations, but I think this Wilwood kit is tough to beat if you’re keeping a small wheel...

https://www.wilwood.com/BrakeKits/Br...+Brake+Spindle
That kit will NOT clear a 14" drum rim. The 4 small pistons in the caliper make it a poor match for rear drums also - you need a smaller bore master (7/8").

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Old 04-12-2024, 09:17 PM
Joe-Touring Joe-Touring is offline
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Quote:
Originally Posted by Scarebird View Post
That kit will NOT clear a 14" drum rim. The 4 small pistons in the caliper make it a poor match for rear drums also - you need a smaller bore master (7/8").
Good to know, those 14” drum wheels must be TIGHT. Also interesting, stock drum/drum master is 1”, correct? Do the factory discs use a 1” master as well?

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Old 04-14-2024, 06:14 PM
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I've driven my '65 and '67 GTO's 100's of thousands of miles in the past 40+ years with the 4 wheel drum brakes. They work fine for me (street driven cars). The key is to have them in good operating condition. That said, there is no downside to adding front discs other than wheel fitment. Both the drum and the disc will lock the wheels.

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