1. Valve covers are Rampart Red for some or all of these engines, pre 1967. Gold was used on some engines in 1967. Alamosa Aqua was used on most 68-71 AMC V8s. AMC Blue on many starting in late 1971. Many of the original suppliers paint charts below reflect running changes. Some California AMC engines red thru 1971 production year. 
2. The 250 V-8 is believed to be the same gray as used on the 196 L-head engines
3. Different sources give different paint codes. Possibly used as dealer service paint of slightly different color. If in doubt, PRINT them and give to your auto paint supplier.
4. All 1971 California V-8's and AMC engines used in International Harvester vehicles were red in color to distinguish them from other engines on the assembly line as California engines required different emission controls. Note also that International Harvester painted their AMC engines red/orange starting in 1972 for Scout, Scout II, Travelall and smaller school buses. If you happen into a salvage yard or junk yard and see a IH anything from 1972-80, pop the hood and see if it is indeed a AMC power plant, which is totally different looking than IH's engines of the 345V8 and 392V8. If not sure, crawl under the engine and check the block size cast under either side underneath the motor mounts. 
5. All 68-70 390 engines had the chrome dress up kit, regardless of model, Ambassador, AMX, Javelin, Rebel & Hurst SC/Rambler it was part of "AMX Package".
6. Engine paint, try Eastwood Products or the big AMC Vendors and search ebay. Not hard to find.
7. P1 (exterior) Black cars prior 1973 was a $54.00 surcharge even though regular paint code.
   

Interior notes:
AMC painted a vast majority of their interiors. Many times you can pull off a dash overlay, or pillar post or hard or soft molding only to discover it started it's life in Kenosha another color. You will commonly find AMC painted to match: red, tan, green, blue, silver interiors. This was done at the factory as it saved major costs instead of having those items molded in all these colors. You can take your interior paint code to just about any automotive paint store and they can mix you a batch. There are sprayers called Preval that are easy to use and leave a great coat, ask about them.

If you need Touch Up or spray can of your color, might I recommend Tower Paint. I have used them for years and recently, Nov 2010, got a spray can of Fawn Beige for my 74 Sportabout and the as usual, hit color dead on, can't tell spray from original Lustre Guard AMC paint!!