Confused what to do with a 5.9L serpentine setup

Here’s my 68 barracuda with the van bracket and magnum 5.9 truck brackets on everything else (it’s the ac delete alt bracket). Works great. I did relocate battery to trunk, which I assume you will too with your build.
Nates68
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@nates68 Do you know the length or part number for that belt? Thanks!