Well, ScummVM and Day of the Tentacle runs fast here on my A1200 with 030 at 50 Mhz. WITH BlazeWCP running
(almost to fast) Just start it before you start the ScummVM-Engine and you won´t have any problems (btw. also runs fine with Kick 3.0, the black screen appears on some systems but it got nothing to do with Kick 3.0
Oh and btw. it is not an emulation ! ScummVM is an Interpreter for LucasArts adventures and uses the data stored in the game files on PC, it replaces the .EXE from the DOS Version !