Speedo tweaking

[Cody Forbes]

Anybody have experiance calibrating thier electric speedo (5ktq specifically, but I bet most are simmilar enough)? My white '87 5ktq is reading about 10% fast when compared to the average speed display (reset then see what the first valve displayed is and compare to current speed). I don't want to end up pulling the cluster 10 times while randomly screwing with the DIP switches, so hopefully somebody out there knows the configuration.

TIA,
-Cody Forbes
http://www.5000tq.com
'87 5ktq - Fast.
'87 5ktq QLCC'd plus some
'86 5ktqCD
'86 5k
'86 5k