I have a customer who wants a serpentine belt drive for the Hemi motor I'm building for him, he will probably have power steering so it needs that and the water pump and alternator driven.
Who makes a good ones and who to stay away from will be helpful
All help appreciated

CVF, you may have to clearance a few bolt bolts or core plug castings depending on what heads. I turfed the front view, sorry.

I run a March same as you describe and It is very good. No clearenceing if you use their fasteners,

Check out sdconcepts.com

Keep in mind some serpentine systems turn the water pump reverse rotation, which is ok with the Mopar BB water pump fins, so you'll need to flip the thermostat, and change the pulley fan if using mechanical fan blades, a cross flow radiator is a good addition if the flow is being reversed, which actually is preferred and a better method of cooling the engine vs the conventional Mopar set up which is as antiquated as the Model T

I second that! Jerry's stuff looks nice and uses easy to source accessory components which is a major plus in my book. And made by a Mopar man. Thats why I have his stuff for my car.

I second the CVF Racing system. I just bought a stealth setup for my 440 . Very nice. I bought the black PS pump A/C condenser and GM 1 Wire all in black. Total with belts about $1250. Very nice with all hardware installation pics could be clearer and order of assembly for parts.