to Marlin!!
I wouldn't just go to Six Shooters just because there is two more studs. They break too! The trick is with straight axles, is that once you get it rebuilt, is you have to periodically check the steering arm studs. It's not a bolt up and drive forever and not worry about it. Look at Marlin's and Bigmike's trucks, which are using the standard 4 stud steering arms, and wheel some of the hardest trails, and sometimes daily drive their rigs. And they haven't had any issues with them, as long as they check them periodically. Alot of members check them once a week, if they DD. Others get in the habit of checking them when airing down and again airing up.