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I have a 70 fastback with power drums that I plan on doing the Granada conversion to and I was wondering if I could use the same power booster or would I have to change it? What m/c should I use? Any help would be greatly appreciated.
 

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Brake booster is fine to use, but buy a master cyl off of a 70 with power discs (I'd go autozone / pep boys rebuild for 20 bucks). The drum m/c has a check valve that leaves residual pressure in the wheel cyls, discs have it too but a much lower line pressure. Without changing it, they will drag slightly and wear much quicker
 
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