I have recently picked up a 2017 rs that has internal damage. Likely piston damage but ha ent pulled it apart yet to confirm. Im having trouble finding a reputable vendor to find a shortblock yet. What are things to look for? I have seen a log of headgasket issues and a few recalls, what are the no-gos on replacement engines? Things to look at? Year ranges to stay away from or to look for? Do any of the other ecoboost 2.3s work? Dont think the rwd blocks would be the same but im not knowledgeable on them yet, doing my research in my free time but havent learned a lot yet.