wow...
you have the opportunity to turn the situation around and benefit from this upcoming repair...
Since the intake has to come off, take a good look at the injectors and think about $200 to replace them with a set from FIC while its all apart.
Service and clean/test the EGR valve, change all the hidden vac lines and get a handful of pushrods or even a new set all around. Those are cheap. If the motor is high miles (close to 200K) I'd buy a set of lifters as well.
Its all a matter of budget of course, but there is a LOT that can be done when the intake comes off. Even if its just simple housework cleaning and securing loose wire, hoses etc, the car benefits. One thing that I would definately do is to inspect the harness on the firewall and all the branches that run off of it. If its broken open or the conduit is damaged repair that and seal it back up. Secure the branches so they are not pulling on the trunk line. The harness is suceptable to damage from corrosion, water, moisture in the sleeve, and wire pulling apart. Securing that section along the firewall can potentially save you a ton of headaches in the future. I advise doing it now because its accessable with the intake off and that leak could have been getting in or on the trunk. That can degrade the plastic insulation...