See this (Vanilla 1.12 & TBC 2.4.3 - Permanent FoV fix (patched WoW.exe)).
All executables have been patched with the LAA (Large Address Aware) flag, which I believe will help avoid some crashes at high farclip values.Let's start with some eye candy, here are a few screenshots. This patch unlocks the '/console farclip value' command available in all WoW clients.