Re: MSD Ignition
If you're going to spend the bucks to upgrade the coils, why not upgrade to the 06> valve covers and coils? You'd also need the coil plugs, as they are different between 05 and 06>. I looked into this for my 05 Hemi LX and gave up on the idea because of the cost and no gain in power. IMO, lots of $$$ just to make it look nicer. I ended up just putting the Taylor Shorty wires on mine, and use NGKLZTR4A-11, Stock No. 5306 plugs. I also use the same plugs in my Hemi WK.
If you're set on doing this, you may want to do a search. There used to be an outfit that sold a conversion kit. Seems to me it was about $300 or so.
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.