I have what looks like a stock turbo that I picked up in an estate sale.
The individual had up graded most of his turbo Buicks with bigger turbos.
Let me know if you are interested.
I used the Dakota Digital gps speed sensor to try & feed my speedo but it's reading 20mph low.
There are a number of setting on the DD gps as far as output speed pulses and not sure which one to select.