4L80E speedometer option
i had a chevelle i was dialing in the speedometer gears for (350 trans), and bought one of those cheap GPS things with the speed readout, was under $100
pretty cool, very accurate, would work great as a budget speedometer-some have a distance feature, not the same as an odometer though
not exactly cheap... but its a really good option for somebody trying to drive a mechanical speedo in an older car using stock gauges.
ShiftWorks
http://www.shiftworks.com/tailhousing.htm










