Mack man 1973 Posted November 19, 2016 Share Posted November 19, 2016 My 69 R has the old pinned shoes on the rear and six in drums what needs to be done to update to 7 in drums and modern brake shoes ? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/47729-rear-brake-shoes-update-question/ Share on other sites More sharing options...
Maddog13407 Posted November 19, 2016 Share Posted November 19, 2016 the pinned shoes with the c clips and the felts? I changed my B over from that. found a U model with a cracked housing and took the spider backin plates, brake can mounts and S cams. reused my old slack adjusters. had to buy more shims for the slack and make one spacer for the s cam tube mount but yours might be a direct fit if you can find a modern set of spiders. this lets you use a modern shoe. mine also had 6 inch lining and I put on 7 Quote Link to comment https://www.bigmacktrucks.com/topic/47729-rear-brake-shoes-update-question/#findComment-352404 Share on other sites More sharing options...
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