Finding carb vacuum leaks with propane torch

["Warren Allen" <warren-allen@triad.rr.com>]

Okay, somebody please explain to me how to use a propane torch to find a
vacuum leak. I assume that, with the engine running, you turn on the torch
gas (unlit) and move the torch around where a leak might be occurring. Where
there's a leak, something changes in how the engine is running. Faster?
Slower? Rougher? Am I close, or way off? Thanks for the info.

Warren Allen
1960 TR3A TS55177L