[HWYSTR455]

For triggering, the FAST uses flying magnets, similar to a crank trigger, in a 'casing' that's on the shaft. It appears to be a typical ford style mag pickup attached to the body.

The FAST shaft and rotor pad looks like a 'regular' dizzy, that's been welded. Both Holleys have a specific-built rotor pad, and is CNC cut.

Both Holleys appear to have very similar electronics, hall effect pickups and reluctors.

The FAST and Holley v1 has a vacuum can delete plate, and there is a hole that is not covered that passes into the body under the electronics plates. This could allow water/moisture to gain access to the inside of the dizzy, and could contribute to a 'crossfire cloud' or corrosion of cap terminals etc. If using one, I would recommend filling the gap(s) with RTV to prevent any potential moisture from entering.

You can see on the Holley v2, the 2 rollpins that are installed into the body to index the cap.

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