If you use 8 row or bigger maize fronts on them there is a chance of cracking but there is a strengthening kit that is available which solves the problem not sure if the kit is standard on the 7050 series.
2011 will have improved strengthening reinforcements. If installing 8 row headers, front tires need to be load rating 178A8. Also 2011 is factory capable of running manual rowsense or full autotrac depending on how SPFH was factory configured. JD dealer can provide that information with a ser. #.
We ran a 710 cornhead on our 2003 7500 but it came with the strengthening kit for 10 row head. our 05 7500 didn't have it factory installed but we installed it. Our 7750's both have it as standard equipment