Sorry man, I don't have any Pro-X parts left. I haven't owned that sled for over two years now and I sold the parts probably 3+ years ago.
the number of spacers behind the secondary clutch is dictated by clutch offset. to figure out your offset lift the back of the sled off the ground, remove the bolt that holds the secondary on the shaft and the washers on both sides of the secondary. Run the sled up to about 10~20 miles per hour for about 5 seconds and let it coast to a stop. measure how much distance is from the secondary to the jackshaft bearing and install enough washers to add up to about .050 less then your total amount. then you want to add the correct number of small washers to the bolt side so the secondary floats in and out about .125". you dont want the clutch to ride against the washers on the back of the bolt side, it should float on the shaft .