distributor moving around help please

As mentioned,, the I/shaft prob isnt in far enuff,, so when you clamp the distributor down,, it crams the dist spade, down into the I/shaft slot in a manner that it can't "float" in the slot, thus transmitting the motion to the dist.. The dizzy is actually being pushed up..

If you can't get the I/shaft to tap down a little lower,, and you can't shim the dist up, perhaps consider grinding a bit off the bottom of dizzy shaft, just enuff clearance for it to "float".. jmo

hope it helps..