Lowering and still being about to tow

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So a couple weeks ago I purchased a 72 C10 LWB Highlander. I'd like to lower the truck, but I also don't want to lose the ability to tow. At a minimum I'd like to be able to pull a 4k lbs car on an open trailer still without issues, but ideally I'd like to pull the car in a 24ft enclosed trailer. I know towing is a common issue, but from searching I wasn't able to find any definite answers.

One of the main requirements is I don't want to have to raise the bed and I'd like to have a ride height close to a 4/6 drop or lower. I also need to replace all the bushings on the truck, so I'd like to just replace everything once.

Here's the 2 options I think I have and some questions about them. I'm open to suggestions

Air Ride - Something I've always wanted to do.
Heavy duty bags to handle the towing weight - suggestions?
Porterbuilt A-arms
Porterbuilt Stage 2 rear setup with bolt in c notch welded and probably will box it in on the other side for strangth
Accuair e-level to keep it nice and level when towing

Static Drop
4/6 drop with 2" drop spindles up front
Tubular control arms - suggestions?
Helper bags in the rear when towing

Which path would be the best option? The truck will be daily driven.