use a dual alternator belt and it must be run this way in red
if you try to run it like the dual alt shows, it will be too short to go on as the pulley for the second pump is much bigger than the pully on the second alt.
i asked dan about running the belt as if you had the PPE centrifuge on an LB7 but never heard back on that as there is a bolt on the powersteering pump that gets in the way of the belt
This is dual alternators i think it is the .
Here's mine I hate the ppe belt routing