Bob, it really isn't all that much more work for the LIM. You'll be doing everything again sometime in the near future to replace the LIM gasket if you don't do it now. May as well get all the "pain" out of the way at one time. I'm older than you are with similar distractions (no Lab) and managed to accomplish it.
Set aside a weekend to do it, so you can take breaks and work at a leisurely pace. You'll have all the help that you need for clarification on any problems right here. You'll kick yourself later, if you don't.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.