GT6John

You could get JDO Instruments to convert it for you. I got them to convert my MK3 GT6 Rev Counter to electric for my 123Tune electronic ignition, works perfectly and was a fast turnaround. This was because i wanted to keep the original "look" with the indicator and demister lights (not sure if the 2.5PI or 2500 ones have this). Might be more then you're willing to spend, not sure. http://www.jdo1.com/rev_counters.html

My emerald green GT6 MK3