What web pages discuss these cars?
http://www.turbo-mopar.comhttp://www.turbododge.comhttp://www.thedodgegarage.com/turbo.html
Are brake/suspension parts still available at Napa/CARQUEST etc.?
Mostly, some may have to be pulled from a warehouse as they are not that popular anymore. I grabbed a spare timing belt for the CSX for example and only Autozone had one in stock and on the shelf.
If not, what companies/junkyards sell parts?
Depends on the parts. What are you looking for?
Can always try
http://www.car-part.com/I just restored an 87 CSX and found most of what I was looking for on Ebay, forums and my storage garage ;-)
How hard is it to change the plugs on a v6?
Thanks
Front is easy, rear is tougher but I have done far worse.