Well Vipey just to do the intake job is like an 10-12 hr job.
So to dismantel the engine and replace all that stuff is ungodly amounts of time.
I have spent between $6-7K on parts/Mods, I'd hate to see what labor would have costed if I hadnt done the work myself.
Maybe 600-800 hrs
No motor biuld are cheap, and you get what you pay for.