Also building a crawler, overland er or in my case a prerunner is going to change you suspension and drive train setup drastically.
Crawlers seem to be the most popular on here, overlanding you're certainly going to need heavier spring rates and prerunners like mine (though relatively mild) use different setups. I'm not in favor of the shackle flip but more a longer shackle and 52" rear springs with a 4" lift from a company like Deaver, ORD, or Atlas.
Links can work well but require more fabricated parts but ord offers a sweet fron and rear kit with shocks that would fit your needs.