89 Vert and T56 swappers

[Z1LE]

Not sure if this works and for what years etc. but found some interesting info on recalibrating the speedos due to different pulse rates blah blah blah

http://www.614streets.com/drac.html

http://www.philter.com/cgi-bin/drac.pl

[Jessev]

sweet, good find

[Z1LE]

http://www.blackrobotics.com/yb_faq.htm

http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=126/category_id=287/home_id=59/mode=prod/prd126.htm

These are other options too

[MonkeyWrench]

just buy after market gage cluster and most speedo's you calibrate by just driving a set distance

[Z1LE]

I think Im gonna do the yellow box but just thought this was kinda interesting

[MonkeyWrench]

i don't have a electronic gage cluster to begin with and i don't really like the stock ones anyway but its a good option if you want to keep them