Columbia Par Car Primary Clutch Removal.

[columbia]

I have a 1993 Columbia golf cart and clutch will not come off. Despite many posts about installing a puller bolt into the clutch shaft, my clutch does not have internal threads to do that. Here is what I have done, but not successfull in getting the clutch off. I installed a push rod into the clutch shaft, then I removed the clutch retaining nut and placed behind that a couple grade 8 large flat washers, and put the clutch nut back on, then I installed a bearing seperator tool behind the large washers to pull against. Then I installed a harmonic balancer tool to use as a push/pull setup. Pushing against the push rod into (towards the crank shaft) and pulling out against the large flat washers on the clutch shaft. It will not budge, what I'am I doing wrong? When this failed I also tried heat, still no go. It seems like a 9/16 fine thread tap might be able to cut threads into the clutch shaft but it would seem the setup I have would give the same amount of pull if not more by doing it as described. It is my understanding that my clutch is an IMC clutch are they known to be different than other clutches? I'am second owner of my cart and it has low hours, it is actually a carryall or truck type cart. Any tips you can give will be appreciated.

Thanks, Ron