Remove the five bolts that secure the coil-mounting bracket to the valve cover. You'll be tempted to remove the coils from the bracket as well, but this is unnecessary. | 
With the coils and their mounting bracket out of the way, you now have unrestricted access to the valve-cover fasteners. The cover is held in place with four captive bolts. | 
With the hardware loose, the valve cover can now be lifted off the cylinder head. |
The Nasty Performance valve covers are superbly machined and quite striking. I opted for this raw, brushed finish, but powdercoating and full polish are other options. | 
Nasty offered me my choice of engraving, but I opted for the company's logo, which is pretty cool, in my opinion. | 
There's more to these covers than just good looks. Even the oil filler is well thought-out, with a beefy O-ring to guard against leakage. It's also easily replaced should it become damaged. |
The groove milled into the bottom of the cover's rail is designed to accept the stock gaskets. If yours are in good shape, you can reuse them. If not, new ones are as close as your GM dealer. | 
Flip the stock cover over and gently pull the gasket from its groove. Use patience and finesse here. You don't want to tear it, which could cause leakage from beneath the new covers. | 
Assuming the stock gasket is still supple and damage-free, you can install it into the new cover. It may seem a bit too long at first, but careful compression along the straight edge will make it fit perfectly. |
With the gasket in place, it's time to install the cover on the cylinder head. But first, you'll need to swing the alternator out of the way by loosening the lower bolt and removing the top one. | 
Maneuver the cover in place and bolt it down securely. | 
You can now move the alternator back into place and reinsert the top bolt. Remember to tighten the lower bolt as well. |
Install the coil bracket on the valve-cover mounts. | 
The coil-pack harness needs to be removed from the stock bracket. You'll need to take off one of the coils to give the weatherpack connector clearance. The plastic housing simply unsnaps from the bracket. | 
Next, remove the harness from its plastic housing. The housing simply snaps apart, allowing easy access to the wiring. |