[SCOTI]

The front x-member needs to be minimum 3" off the ground w/4" being better to limit contact.

Aftermarket front 'raised' x-members shine here but add complexity/cost because they need matching arms & the swap to R&P steering.

'Z-ing' the frame is best for a old-school/budget build approach. Combine it w/drop spindles & springs & you can yield close to 7" front drop while keeping the x-member close to 4" off the road. There is still complexity but it comes @ different areas vs requiring different parts.

There's also sectioning (pancaking) a stock front x-member. It fits somewhere in between the above choices & can be an easier solution complexity wise.... but it has compromises.

Having done all three options.... I'd do a frame-Z. Properly done, it yields the same results as an aftermarket x-member while using the tried & true OE chassis set-up.

4/6 dropped trucks drive around w/o issue & work well. Going to that next level of drop is where it get's complicated. The 'Z' would utilize the same proven 4/6 parts combo but get you that much lower. It all comes down to each guys specific needs/wants.