The 6000 series ran from 6000-6800, with 6300 being a common one you see. Galaxy 1 is a different board. With the 6000 series, one big change was the Coin Credit board. I am guessing you have this, along with the thin spider, based on your Version 3.0 software chip. I believe 3.3 was the latest version I have seen of that.
Do you have pictures of your board and power supply? They will help identify what you have
For the power supply, there was the linear power supple, which was the tall one and had a large capacitor handing off it. There was also the switching power supply, which mounted to the back wall of the unit and looked like a metal box with vent holes.
Lastly, what is the glitching issue you are seeing?