This just doesn't look "right" (manual steering)

CFD244 said

No worries Ironracer..........There is a tiny pin just at the top opening of the coupler that has to be pushed out in order to remove the "guts" of the joint. The big roll pin you are referring to is at the gear box end of the coupler :)

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On the early cars like Vixen, that small pin isn't there. I don't know when they started using it. Mine also doesn't have the large roll pin holding the coupler to the input shaft on the gearbox, but rather a retaining bolt and nut. The early cars were different with a lot of stuff like that.