X2. You may need to get an extra pin from a donor car to use for the tach though, I made sure to grab it when I was pulling mine from a Monte SS.
No, the tach filter doesn't make a difference, at least not from my experience :lol: Also, if you're taking the cluster out yourself, make sure to get the sending units if you can. The senders for the dummy light cluster are basically just pressure/temperature switches.