This is what I bought but have not yet installed. My cousin swears by it - uses it in a blower motor car. Whats nice is its relatively cheap and has built-in trending accessible via USB.

https://www.amazon.com/gp/product/B007ZAQLF6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......