Here are some pictures of my homemade throttle bracket. Like other's the Vans supplied bracket positioned the cable too low. I made this out of 4130 sheet. It positions the cable higher, closer to the sump. As an added benefit, it gave the cable a slightly better angle relative to the linkage.
Haven't flown yet, but I have run the engine on the ground and no problems so far.
Mine is a factory Lycoming IO-360-M1B bought through Vans.