Hey Jeff, thanks!
1. The headers were painted with different shades of Alclad II metalizers and then some Alclad transparent blue, hot sepia and smoke. And lastly, dullcote.
2. Not all of them. They have several that are all-new designs, like the older Monte Carlos and Oldmobiles, and they are 1/25 scale. The 1/24 scale kits like this one are the old Monogram molds, with some additions here and there. The nose on this one is new and was not available from Monogram.