Top speed issues, etc

[speedracer95v6]

I have researched this but i need some answers from those that have acutally tried these things.

I want to put a 150mph intrument cluster in my car. I know that a company makes an adapter so that the v6 tach signal is up 125% somehow so the tachometer is correct on the cluster expecting a v8 signal. My first question is, does anyone know of a cheaper solution, meaning does anyone have wiring diagrams for the item i just described or have any idea how to turn the v6 signal into the v8 signal so i would get 100% of my rev showing?

My second question deals with the jet scu 2000. I have heard that once you reach the governor the speedometer stops and the tach keeps climbing. in the case of a 150mph speedometer, this wouldnt help much cause i couldnt see how fast i was going. if i did the cluster swap and installed a jet scu 2000, would i be able to see how fast i was going beyond the governor(i am using a '95 4l60e and soon to be using a 96 3.8L with it)

[97 30th RS]

I heard you have to get the whole assembly that reads to 150 and get the Jetscu 2000 to read how fast you are going. The only reason that 3.8's are limited to 125 is so that they can market to 150 plus Z28. Honestly, with my mods I can hit 150 all day and it does not take an abnormal amount of time. I have heard guys hittin close to 140 mph stock with the Jet thing only, you can't actually see it. You have to go side by side with a mustang gt or z28 to actually know.