MagnumMPI swap - crank pickup fix?

Not sure about the flywheel. The ones I've seen for a 10.5" clutch only really cover the balance issue but don't seem to have a tone ring.

I think the one referenced in the MPI kit is a 143T flywheel for an 11" clutch.

The dual pickup distributor was a special one off setup that never made it past the prototype stage.

There is a thread in the 4 speed forum with some pictures if you want to see how a flexplate works behind the flywheel.