magnum dist cap adapter pics...

Magnum caps attach with screws rather than clips making them more secure.

Magnum caps are made from more modern materials making them less likely to crack, chip or carbon track.

Magnum caps have male, spark plug type wire terminals. The plug wires "snap" in place making them more secure and less likely to corrode.

The big three (GM, Ford and Chrysler) all converted to this type of cap (HEI, Duraspark and Magnum) for the above reasons.

plus i already have the hei style ends on my wires and this will save me from buying new wires when the msd comes out of the car and the stock style ign goes in.