[Guy]

clarkes 6v92 has no electronics to it, so silverleaf is not an option for him.  

i think in late 80's is when the detroits newell used had the ddec in them.  

tom

Todd, the prior owner of our 1984, installed a Digi-Panel in the overhead console. It seems to work really well. Has engine and trans temp,
oil pressure, battery voltage. Both audible 85db and visual led bar graph.
Audible doesn't come in to play until things are getting serious.

It was trying to tell I had a battery or charging problem with the chassis batteries last fall, and sure enough I had one bad battery.  You can disable the audible after it has gotten your attention, so that you don't have to deal with 85 db, and the issue at hand. It also proved its worth crossing the continental divde last summer. The temp graph wentfrom all green to green with one bar of orange. After slowing down dropping a gear, and keeping the rpm's up, we went all green. Keeps my anxiety level at a four : great investment for $235.00