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Old 01-25-2008, 10:32 PM
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67 Bonneville.....HELP

We have here at the shop a 1967 Pontiac Bonneville that we are working on. I was looking for a complete brake system to replace and modernize the old one and also for a 2 inch dropped spindle for it, suspension also if possible. I havent been able to locate anything for it. Is there a gm vehicle thats compatible with this 67 Bonneville that uses the same parts? I know the bonneville is a b-body so would it be compatible with other b-body gm's of the same year? It seems aftermarket parts for this vehicle is rare or non existent. ANY help or info is GREATLY appreciated.

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Old 01-27-2008, 12:46 PM
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Here's how mikey does the moderators bump....

With over 40 members and over 300 guests who could register and contribute to the board this morning, I can't believe no one can help this guy.

I know that a friend of mine had a 67 B'ville in HS, that was a party barge for sure We went to alot of concerts in that car.

Later, mikey
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Old 01-27-2008, 12:54 PM
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Let me help, Mikey...let me....(Hand raised in air and waving furiously)

Scarebird has caliper brackets for this car.......You use later model, readily available parts with it. They will have to tell you what parts.

Front.....1959-68 Pontiac Bonneville, Grand Prix, Catalina $135

Rear....1955-70 Pontiac-Olds full size $115

http://www.scarebird.com/6928.html
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Old 01-29-2008, 07:44 PM
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Thats a start, thank you very much. Anyone else have any ideas or orther for upgraded suspension parts dropped spindles?
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Old 01-29-2008, 09:55 PM
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There was a tech article wiki awile back -search using buick olds pontiac upgrade. It referances that 58-70 Pontiac spindles are pretty much the same design. In that article, Classic performance products has a dropped spindle that's very closeand will work with the pontiac ball joints. However it's a 4 3/4" bolt pattern and only 11" rotors. They may even have a brake upgrade available. Depending on what size wheels you are using you're limited to rotor size.

That would almost seem like a downgrade to the massive front drum brakes on the 67 that it has now if only 11" rotors were used.

A few options would be to find a 69-70 Pontiac with factory disc brakes, rotors may not be made anymore and not available and if the doner car has junk rotors I would pass.

Or get the Scarebird conversion parts -12" rotors I believe - and maybe put in some springs instead that will lower it a few inches. Keep in mind that they may be sagged already, so sometimes when springs are changed it may not drop it as much. I would contact someone like Detroit Eaton spring and see of they can get what you need.
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Old 01-30-2008, 07:46 AM
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Mikey-----I did see this post when he first posted.

I'm still just trying to figure out why this thing needs a 2" drop.

My stock height 67 Catalina was low enough to plow snow (only car I ever had that did not make 100,000 mi----overheated one too many times in Phoenix and I had it crushed @ 97,000)

As for dropping----being a rear steer car (IIRC) what might the cances be that a 55-57 Chebbie dropped spindle could work???

Just a thought.

Bryan
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Old 01-30-2008, 09:05 AM
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Keep in mind this type spindle uses upper and lower ball joints that both point down. I believe the tri-5 lower points up.
He could always just cut a coil off the spring if the rougher ride is acceptable to achieve the 2" drop...
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Old 01-30-2008, 03:28 PM
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I used Scarebird's brackets on my 68 Bonny. Worked great and installed easily. As far as the spindles, I have read a lot on the subject, and most of the opinions I've read say that the dropped spindles also screw up the steering geometry. The consensus is to get shorter spings and leave the spinldes alone.
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Old 01-30-2008, 06:52 PM
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Thanks for the info, its pointing me in the right direction. I may have forgotten to mention that the Bonneville is an original 4 piston disc brake vehicle. The main reason im looking to change this setup is due to the fact that original parts are near impossible to find. I contacted classic performance products who told me that they may be able to help IF i can get the original pontiac gm part numbers. They may be able to cross reference those pontiac numbers with their chevy original part numbers. Any help in this area would greatly be appreciated.

Question, does anyone know that the Scarebird Conversion Brakets work with factory disc brake spindle or is there a difference between disc brake spindles and the drum brake spindles. Or if anyone knows weather there is a replacement one piece rotor for the original 2 piece rotor. Thanks to EVERYONE in Pontiac land for your help.

Last edited by marcosgarage; 01-30-2008 at 07:30 PM.
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Old 01-30-2008, 07:26 PM
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I had a '68 Cat convert, dropped the front with cut coils and realignment. Handled great. Stock drums with metallic shoes would slide the paint right off the car. Why reinvent the wheel? These mount the ball joint "upside down", so you can't swap a spindle from anything else, and they are rear steer, unlike the later B bodies. You're right, there is NO aftermarket support for these things.

Brian
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Old 01-31-2008, 07:21 AM
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I know some other guys have sent Scarebird 69-70 disc brake spindles to make a kit using available parts.
You could either send him your disc brake spindles and have him make a kit or sell that set up to a restorer and buy some drum spindles and buy the kit already available for those.

I'm sure there is someone that could rebuild those, there like the old Corvette type caliper and need stainless steel sleeves installed. I had the 4 piston calipers on my 68 GTO and had nothing but problems. But the single piston set up would be more reliable and probably less expensive.

Last edited by chieftain; 01-31-2008 at 07:31 AM.
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Old 02-01-2008, 07:22 PM
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Quote:
Originally Posted by marcosgarage
I may have forgotten to mention that the Bonneville is an original 4 piston disc brake vehicle. The main reason im looking to change this setup is due to the fact that original parts are near impossible to find.
I had this same issue on my 67 Chrysler 300 with disc brakes

In 1982 the rotors (only from Chrysler) were over 125 each.
The calipers were virtually non replaceable-----4-piston fixed
Lower ball joint on this car was 100 ea. IN THE EARLY 80s.

Took care of this with a swap from a 73 Plymouth Fury
single piston floating calipers---spindles & lower control arms.
dime-a-dozen rotors
$23 ball joints
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Old 02-03-2008, 12:44 AM
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I came across these guys while looking for some parts for another bizaarro one off setup..

http://www.alretta.com/

Give them a call, they specialize in older stock systems, they may have the calipers and rotors.

Later, mikey
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Old 02-03-2008, 05:42 AM
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If you want to do it the down and dirty way, do what I did. Go to a parts store and ask for the Moog catalog (or whatever brand of chassis parts they carry).

Find your car's parts, then in the back of the catalog they list specs; ball joint taper, spindle bearing sizes, etc. Start charting the hard facts and you can usually find a combo of parts that will bolt in.

I was able to put 3/4 ton chevy spindles and brakes on my 66 Bonny using almost all stock parts. The geometry wasn't right with the stock upper arm, so I found a tubular arm that worked, but those catalogs and some patience are a wonderful tool.
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Old 02-06-2008, 07:57 PM
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Thank you EVERYONE for your opinions, suggestions, and web site info for parts.
We have decided to go with the scarebird brackets that have to be custom made. The spindles are already on there way to scarebird. This project vehicle is well on its way now. Anyone interested in updates on this vehicle just let me know.
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