As far as looking for frames to convert goes, just focus on getting something with
-Horizontal dropouts
-Fits like a glove
-Doesn't weigh a ton
A lot of times people on here get crap for bastardizing a high quality road bike. You shouldn't go in looking for a high end vintage frame if you're going to take off lots of nice components and devalue it. Some things to avoid
-Old Peugeots (They have lots of irregular and hard to find parts)
-Really old bikes (pre 80's)
Basically, you're trying to avoid bikes with parts that are obsolete or irrelevant to the FG world (Funky cranksets, french threaded bottom brackets and headsets, weird sized stems etc.). If you're skimming craigslist and want a second opinion we have Craigslist Finds thread where you could ask or you could just bump this. In reference to the hazing we do, it's usually reserved for people who ask questions that are googleable in 2 seconds or posters who ask for advice and then do exactly what we warn them not to. You're neither of these so we cool