I am going to convert to disc brakes (front)on my 67. I have seen modifide spindles for sale and I want to know if the ones I have on the car (stock) can be modifide? If they can be what needs to be done to them. I think it has to do with a boss that holds the backing plate?

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http://sites.netscape.net/1969ss/homepage

I modified my old '67 drum brake spindles for disk conversion, but I haven't assembled my front end yet. David Pozzi has a nice website that lists everything you need for what you want to do. Check out his site at: http://ourworld.compuserve.com/homepages/David_Pozzi/vintage_transam.htm#Converting Drums to Discs




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Jeff Bradway - my resto page: http://67camaro.virtualave.net

I did not see anything on his site about about the spindle mod. or if it was there I did not see it. What did you do to them?

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http://sites.netscape.net/1969ss/homepage

I used a junk disk spindle and measured the differences. It is only different in the upper bolt boss both in depth and slightly in casting shape. What I did was measure the difference in the upper bolt boss and machined off the difference. It should be about 3/8" lower than the boss where you bolt the steering arms. David has a real good picture of how to measure it. My uncle has a Bridgeport mill that we used to machine the boss down. There is no additional work other than that. I have heard of some drum conversion companies who perform this work on used drum spindles and include them in a kit. Here's a picture of my finished spindle: http://67camaro.virtualave.net/pictures/P8260004.JPG

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Jeff Bradway - my resto page: http://67camaro.virtualave.net

Try this link
http://ourworld.compuserve.com/homepages/David_Pozzi/vintage_transam.htm#disc_brake _spindle (http://ourworld.compuserve.com/homepages/David_Pozzi/vintage_transam.htm#disc_brake_spindle)

There is a good side shot of the upper spindle boss. It should be 3/8" below the lower spindle surface. I guess you need to cut off about 3/8" to 1/2" from where you are now.
David
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The older I get, the faster I was!



[This message has been edited by davidpozzi (edited 06-19-2000).]

If cost is a factor, go with the 1969 type single piston caliper and spindles. They will be much cheaper to maintain. The 67 & 68 dual piston ones are notorious for binding or leaking unless you spend the extra money to get the ones with stainless steel sleeves.
The 1969 type where also in Olds Omegas and Pontiac Venturas and a bunch of other cars that have been listed on this site, so they are pretty easy to find in junk yards.

Can I use the single piston with the modifide 67 Spindle? After getting the spindles done all I should need are new rubber hoses, rotors, backing plates, calipers, booster/master, bearings and seals. Does the list sound complete?

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http://sites.netscape.net/1969ss/homepage

Joe, I think you'll also need a proportioning valve. Steve Laabs

You can get a combo valve that does the distribution and brake balance valve (proportion valve) from later model cars.
You'll also need the single piston style caliper brackets. They look like this: http://67camaro.virtualave.net/pictures/P1010088.JPG


[This message has been edited by jbradway (edited 06-20-2000).]

ummm.............Where can I get the brackets? What year and car would be the best to get the combo valve from ???

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http://sites.netscape.net/1969ss/homepage

Joe,
I went to a few local salvage yards to get everything. I found a left bracket at one yard and a right at the other. I am using new rotors but everything else is used parts. David Pozzi has a good list of the interchange cars on his website where you can find the parts like the combo valve you are looking for. He also has good details on the drum to disk conversion.

The caliper brackets are different between the 69 single piston type and the multi-piston 67-68 type.
I'm not sure on using the 67 modified spindles either with the single piston type. I would guess no.

Personally, since I'm use to throwing money down my "black hole", I would rather pay $450 for a complete used single piston change over kit (maybe add $50 for new rotors) with proportioning valve and disc/drum master cylinder, than mix and match to try and save $200.

The 67-9 spindles are the same except for the drum-disk differences noted above. If you feel uncomfortable with the modifications to a spindle, then you should search for a used spindle or purchase one of the new ones. I made the decision to modify mine based on the availability of a mill and the desire to save $400.

Has anybody thought of not machining their 67-69 spindles top bolt boss down 3/8", but rather adding a 3/8" spacer to the bottom bolt to bring the caliper bracket out correctly? Then use a corvette rotor and put it on the outside of the brakedrum hub. Just asking. pdq67