Allagash wit clone recipe, tasty.
That looks to be a very good recipe, yes!
Traditionally, (e.g.,
Hoegaarden) 50%
flaked wheat is used in Witbiers. You could use either Pilsner malt or a Pale Ale malt for the balance.
You may need to add rice or oat hulls depending on your mash tun/lautering system. If you mash in a bag you probably won't need them, just a good squeeze. A sparge may help with your (lauter) efficiency.
I'd recommend milling the flaked wheat for faster hydration and enzyme access. You could boil them for 30', ahead of the mash for better gelatinization, and faster/better conversion.
You may have a hard time finding
Grains of Paradise, and although historically known as the "poor man's pepper" they're crazy high-priced now, if you can find them at all.
Use regular crushed/powdered pepper instead, either a black or white variety.
I'm glad the recipe mentions
ground Curacao Orange Peel (and ground Coriander). Pulverizing the dried orange peel* will provide better/quicker flavor extraction from it. You can run a few chunks in a spice mill, spinner-type coffee mill, or chop up finely with a sharp knife. When adding to the boil, it's all about rehydration and permeation, and large chunks don't do either very well.
*
Curacao Orange Peel is generally sold as
Bitter Orange Peel, which should be the same product (allegedly). If you could lay your hands on a fresh Curacao Orange, and use its fresh peel, that would be best. Alas, they're very hard to find, and chances are you may get duped in the buying process.