I have been dealing with depleating engine coolant over the summer. I never found the leak but I found it for sure a month ago. I nailed the gas in front of my friends dodge and as I was about to look in the rear view...I see a puff of white smoke. I'm 99% sure it is the lower intake manifold leak issue.

My questions start with my car has almost 150k on it. I was looking at doing some other type of mechanical tasks to the car while I'm in there. So here are a few of the things I was thinking.

Spark Plugs and Wires
Changing Rocker Ratio'*
Changing Supercharger oil and coupler(getting noisy)
Fixing the LIM gasket

Is there anything else anyone can think I need to do while I have all this ripped off?

Also, Is there anyone who has a parts list for some of these jobs. I can't afford to not have parts in had before I perform the work over a few days. Thank you.

https://www.gmforum.com/t278911/

take a look at this and it will walk you through it
you will also want to do valve cover gaskets while your there and might as well change the supercharger pulley
https://www.gmforum.com/t278815/
https://www.gmforum.com/t278960/
https://www.gmforum.com/t278817/
https://www.gmforum.com/t279064/

these should get you done and back up and running

1. What spark plugs would be best if I'm already @ stage 1.
2. Do I need to update my pcm tune after I am done.
3. Is there anything else besides plug wires I would need. (What are good plug wires anyway?)

You will want to be 1 heat range cooler then stock, you could even go 2 ranges cooler.

A PCM tune is a good idea, it will change the abuse settings, shift points, and a few other things that will make the car more fun to drive.

a good set of wires would be bosch and use normal copper plugs nothing conducts electricity better than copper other than gold but wat too expensive
not sure on the Pcm not my cup of tea there
i'll have purplehazier or 2kg4u look here and make sure im not missing anything for ya

So autolite 104'* with bosch wires? Is that what is suggested? I'm basically stage 2 after the rocker install.

That will be just fine. I'm running autolite 104 with MSD wires, the wires you listed are just fine.

Should I keep my pulley size the stage 1 size?

by stage 1 you mean 3.5" right?

Intense stage 1:

•INT-FWI-xxx - INTENSE™ Fenderwell Intake Kit
•IMH-340 - INTENSE™ Modular Pulley System with 3.40" Pulley - L67 equipped vehicles ONLY
•IMH-360 - INTENSE™ Modular Pulley System with 3.60" Pulley - L32 equipped vehicles ONLY
•GB6-660 - Goodyear Gatorback Supercharger Belt
•GB6-715 - Goodyear Gatorback Supercharger Belt for Bonneville Only (+$18.00)
•TST-180 - INTENSE™ High Performance 180 Degree Thermostat
•ASP-605 x 6 - Autolite® 605(one heat range colder than stock) Copper Core Spark Plugs
•PCM-xxxxx-xxxx - INTENSE™ Standard Powertrain Control Module