just to replace lash adjusters? It depends on the tool you're gonna use to compress valvesprings. If it's something that won't have a handle sticking out the side then you can just take the TB off.
If there's any chance you need some clearance then leave it on and remove the intake plenum. The rear 2 bolts have studs on them to hold a plate that holds the top of the dipstick. This is a royal PITA to remove. It's easier if you take an 8mm socket and find the screw underneath that plate that holds the dipstick, otherwise you can't get it out of the way.