Q: brake fluid in exhaust on 2002 Dodge Ram 1500

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Slow leak caused brake reservoir to go low sometimes. When refilled, if I pumped to bring up pressure, a massive cloud of white smoke would come out the exhaust. Yesterday a brake line ruptured - when the van was started to limp it to the mechanic, so much smoke came out the exhaust that people thought it was on fire and came running out to look. After the van ran for awhile, all the smoke was gone. While full of smoke, engine ran very rough, but as it dissipated the engine ran fine. How is brake fluid getting into the exhaust system?
(1) Answer
You have a leaking brake master cylinder that is leaking in to the power brake booster and then sucked out by the vacuum supplied to it for power brake assist. Typically has the vacuum feed to it from the intake and when brake fluid enters it will go past intake valves, into cylinders, past exhaust valves and out the exhaust. Oh what a tangled web we weave. Good luck.