what would be the most rugged crack resistant flexplate out there for extreme use ford 460 external balance to Ford c6

 

Extreme use is pretty general. The stock flex plate can handle quite a bit of power. How built up is your C6? This is just as important as the amount of torque you will be putting to it.

 

motor is about 600 hp and mild build up on C6 for towing and 4x4 use ....mostly low end power. IU had heard good things asbout this one (any feedback out there?):
PRW 1846010 Xtreme Duty SFI-Rated External Balance 164 Teeth Steel Flexplate for Ford 429-460