The protein skimmer is intended for the sump, but clearance is limited when it comes to raising it more then a couple inches. It seems building a sump would help maximize my limited space adding some water capacity. This will add time and expense, but is probably the best option IMO.
I guess I could add a baffle to each side that would act like an over flow box and be less cumbersome then the traditional box. This would require probably modifying the overflow tube, adding extensions.
I will have to think this through. Considering the long term, the fewer siphons I have to maintain the better. I guess I am leaning towards the bulkhead option.