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  1. Nice job and excellent write up!! It seems that the ACdelco master cylinder you used isn't available anymore (at least I can't find it online). Looking at other 67 Wildcat Disc/Drum master cylinders, it looks like those are 1 1/8" bore and our Power Booster is made for a 1" bore. Did you have to make any modifications to fit the master cylinder into the 64 Power Booster? Also, how did you determine between Bendix or Morane capable master cylinder and if it was shallow piston hole? The block that you used, did it have any metering function to it or was a st
  2. I guess it is based on comfort level and/or maintaining originality. Carl
  3. Tom Very good writeup but do have a couple more questions. Master cylinder/power Booster I was planning on keeping with the Rivera line and use the 67 disc/drum dual reservoir master cylinder. Because the 67 master cylinder is 1 1/8 bore and the 64 is 1" bore, I will also purchase the power booster as well. I thought I read someway that the power booster has the same firewall bolt pattern as the 64. Hopefully that is true. Going from a 64 1" bore to a 67 1 1/8" bore master cylinder I will lose some pressure but can't see it being enough to affect rear brake perfo
  4. If this helps, the markings on my bracket are: RIV B27 WLD USA Carl
  5. Yep, I was focusing on Scarebird duplicating the GM system and had tunnel vision. With Scarebird selling alot of these for so many years, I figured I had to be missing something. I received feedback from Scarebird and they said the bracket had changed and can no longer use the Riviera caliper and rotor parts. Hopefully the the Deville caliper will bolt up the same way. I don't see why they wouldn't. Now I just have figure out the rest of the system. Thanks again Carl
  6. Tom With the 64 Riviera using 1 1/8 wheel cylinder in the front, 1" wheel cylinder in the rear and a 1" bore master, I would assume the rear lines would be the smaller ones 3/16". I have not verified it yet but believe that is what currently is used. Since the lines have never been replaced, the 1" bore must be able to supply enough volume to the smaller rear and larger front. However, with the Scarebird system calling out a 71-76 Deville caliper, that bore size is 2.94 inches. It seems that the piston in the disc brake should have less distance travel but would that affect the mas
  7. I know there is a difference between Bendix and Delco Morane compatible master cylinders. From my understanding is you want to go with the Delco Morane combination. Not sure if that would cause the hard pedal pressure or the bore size difference. I either case you don't expect hard pedal pressure with power brakes . Seems that there was some restriction somewhere and maybe even in the proportional valve issues. In any case, I understand why you would go back to drums. Are you also going back to single reservoir master cylinder ? The whole master cylinder/power booster is the next t
  8. I can see why the front lines could be smaller since Disc brakes like to have 2-3 PSI preload and start braking above that where drums like 10lbs of preload. Disc brakes also do not need as much flow because piston travel is lower. However, that seem to contradict the small tube to the back brake theory. I would think the smaller tubing would have slower response unless the small tube can provide the required flow. If my understand of proportioning valve is correct, I would expect the (adjustable or one from a 67 Riviera) proportioning valve could compensate for it since those rely on rear bra
  9. I will have to get out there tomorrow and check. Would love it if was that easy. Thanks Carl
  10. Pictures are worth a thousand words and knew I was over looking something. So the bracket itself is acting as the cradle/support bracket and taking to stopping force load. This makes so much more sense and makes me much more comfortable with is. I do wish Scarebird would have more pictures showing the setup. Rivnut: I missed this on your post Thank You Carl
  11. Nice exploded view. That kind of confirms step 1 in post #3. Willwood uses a dual piston design and does not need a support bracket and is not a floating caliper design. These are just like what is on my Vettes where the caliper is bolted using harden bolts to the steering knuckle and trailing arms in the rear. Thanks Carl
  12. Tom, Being that I don't have the 71 calpers (that is if I can used them with my bracket) I did not know if the sleeves are press in. Looking at the brake service manual SwedeDownUnderR63 sent me it does appear the sleeves would allow the floating. After reading the description's, it does imply the support bracket has a secondary attachment that does not rely on the guide pins. However the Scarebird bracket that I received does not include provisions for a secondary attachment. Of course, my bracket is also calling for a 71-76 Deville calper. So Scarebird my have changed the b
  13. The brake components might be designed by Buick but in GM's 1971-76 design it included a second component (mounting bracket) that the caliper sits into. From what I understand, the conversion kit does not use this part. This is apples and oranges comparison . I my mind, the mounting bracket is a critical component. By buying the Scarebird bracket you are constrained by there system. I wish I had a service manual for that year, I could show you that part. I have email Scarebird to see if this mounting bracket/cradle is or can be used. Will be interesting wh
  14. And that is way I may go. I rebuilt the system brakes last year and for some reason, but I can not get rid of some weeping around the rubber brake line that connects to the wheel cylinder. I am thinking it is related to the fine Chinese craftsmanship of the mating surface. I could replace them again however but since I was already changing out the brake lines and going with a dual reservoir master cylinder, I was taking another look at disc brakes. Carl
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