I'd agree, 2-3 hours, if all comes apart well, like the crossover pipe bolts, and downpipe bolts. Pulling the Motor is actually pretty easy, you don't even have to pull the Hood off,,, putting it back in takes a bit longer however.... If I had to do major internal work, besides Headgaskets or T-chain, I'd pull it, it's alot easier to work on it on a stand, and you'll do a better job.