The modular design of the 1988-1998 Chevy/GMC trucks lends me to think I could swap out an instrument cluster from any of those versions for my 1991 C1500. Can anyone confirm this? The 1991 has those awkward white progression gauges which irritate me. Thought I'd go back to regular pin/needle dial type if I could. Is adding one with a tach gauge easy to do for one which currently doesn't have one?