Add dual battery after the fact

[Krafcik]

How hard/expensive do you think it would be for the dealer to add the dual battery/bigger alternator to a Tremor sitting on the lot?

 

[Chris21667]

How hard/expensive do you think it would be for the dealer to add the dual battery/bigger alternator to a Tremor sitting on the lot?

that is a question you should as a ford dealer i can tell you the dual battery and dual alternator run in parallel ... same wiring harness for batteries and alternators and starter
In the pictures you can see the black conduit that has that wiring harness.... I think it possible but idk if you want to pay that labor bill