Does anyone know if the a/c compressor, lines, etc. from an 84 GS will swap into an 83? Did they leave the mounting bracket, thread pitches, etc. alone between those two years? The Black Dragon catalog lists only one version of the hose assembly, and says it's specifically for 84-85 with dealer installed A/C; they also list three different compressors for that year range, it's kinda confusing. Anyone done this swap? (The 83 that this stuff might be going into is in the next state over, so I'm trying to avoid shipping parts that won't fit.) Thanks!