Swaps: None. The so-called "Cyclone" motor is just a 4G63 with a funky intake manifold that's more trouble that it's worth.
Distribution, 50 front, 50 rear, varies with slippage. (Viscous center differential)
MachV motorsports has a good MB, and DSM.org ought to have links to large message boards.
Safe boost: Approx 1 bar. (14.7 psi) don't go higher than that without fuel pump rewire/new fuel pump and injectors.
Don't forget: Your stock boost gauge isnt' a boost gauge it's a giant peice of crap don't rely on it for anything at all whatsoever. Get a real, honest to god boost gauge.
Hope that helps.
1G DSM's are great cars. I miss my 93 TSi. *sniff!*