SBP to BBP rear drum change
If redrilling the drums is such a bad idea why in the world would Yukon and Moser offer a kit......use your brain!!!
Ok, let’s use our brains. Yukon doesn’t sell brakes at all. Moser’s only Mopar brake package is just a Wilwood disk kit, so they’re just making wholesale. Neither one of them sells drums, so regardless of which axle you buy they still make their money.
And it’s not really that it’s a “bad idea” or that you’ll have “issues” with re-drilled drums. Re-drilling the drums isn’t dangerous if it’s done correctly. Performance wise the 10x1.75” brakes are ok, it’s not that they’re dangerous or anything either. Using those SBP offset axles just locks you into buying small bolt pattern drums and then paying to have them re-drilled every time you need new drums. With as little as most people drive these cars that’s probably only a one time deal, sure. But some of us drive our cars enough that we could be replacing the drums a few times. And the small bolt pattern drums have fallen out of production a couple of times, there was a stretch of time not that long ago where you couldn’t get reproduction small bolt pattern drums, so for like a year or more if you needed a SBP drum you had to go on eBay and either buy a used drum you hoped could be turned or pay ridiculous NOS prices. There are several threads on here that talk about that.
The SBP drums only came on A-bodies. The BBP drums came on just about every RWD Mopar until 1989. So, which do you think is easier and cheaper to find parts for? If you’re already replacing the axles, it just makes sense to use the BBP drums too. Better and cheaper parts availability, parts work straight off the shelf and you get (slightly) better braking too.
