## Issue Addressed
NA
## Proposed Changes
Run fork choice when the head is 256 slots from the wall-clock slot, rather than 4.
The reason we don't *always* run FC is so that it doesn't slow us down during sync. As the comments state, setting the value to 256 means that we'd only have one interrupting fork-choice call if we were syncing at 20 slots/sec.
## Additional Info
NA