I recently located a factory dash for my S-10 blazer with a factory installed Tachometer. The tach works well with the currently installed 2.8L V-6. I am in the process of converting to a V-8 with an HEI or Mallory Unilite distributor. Does anyone have a wiring diagram or schematic for this tach or know what adjustments need to be made to this tach for use with the V-8?

1991 Plymouth Acclaim, 3.0 Litre V6 Engine, Front Wheel Drive, Automatic Overdrive Transmission, Original LOW miles: 55,485 The missus started complaining about her car a week ago and I finally got to check it out yesterday. The transmission started acting up. When you first use the car in the mornings, for the first 15 to 20 minutes of driving, the car seems to stay in 2nd gear and not up shift any further. Yesterday I took it out on the expressway and the engine had to rev at around 3500 RPM and above to keep the car at 50 MPH, wouldn’t shift to high gear. After about 15 minutes of driving I stopped and shut down the car for about five minutes to check fluid and trans linkage. When I started up again the car did shift up through the gears, but very harshly on each shift (bucking) and the same on downshifts when I slowed down. I keep a good record book on each of my cars, the trans fluid and filter was changed at 30,581 miles in August of 1998, so I know it’s time for trans fluid service and possibly using one the many trans fluid additives that are out there. The fluid still looks nice and fresh, red, not a burned brown color. Do you think a fluid/filter change will help or is it time for the Transmission shop, probably internal repairs needed? Thank you.