I know this is the Duratec performance area, but since this is a how-to for the P/S VF mount, I thought this would be good knowledge to those people with SPI's looking to upgrade their mounts.
The VF P/S mount for the zetec does NOT fit the SPI.
I learned this the hard way today.
The mounting bolts are farther apart on the SPI.
Here's the proof: