Yeah I can see that these headers will be painful for any sort of maintenance. Replacing the starter is probably a half day job with these headers in the way. And it looks like pulling the trans out of the car will require moving the headers out of the way.

I'll keep looking at different options for the coil packs but right now I'm leaning towards putting them on the valve covers. Pulling the covers isn't that bad, just unclick the connectors and the plug wires and then pull the cover off. The coils come with the cover so you don't have to mess with them.