Here a vid for a 2006 Hemi truck -
https://youtu.be/bxbUzTGNU7U
I've done the Seafoam treatment to my 2004, via the brake booster line. That was several years ago and it didn't seem to do much so maybe my engine didn't have build up?
I have been adding a can of Seafoam to the gas tank every now and then and sometime I use the Lucas gas treatment instead. I've also added Seafoam into the crankcase about 100 miles prior to an oil change. Never had any problems. 192k on the truck now. I should probably try doing the booster line treatment again, just to see what happens.
Seafoam also makes a Trans Tune version that I have ran in the truck for a long time. That stuff does actually work IMO. I've used it in another truck that was having shifting issues and they cleared up.