As Ed said, the 2D was basically a re-bodied 2 so that should widen your search for reference photos. There's a little information on the Chaparral site:
Here is a link to the 66 Mercury brochure. The 427 wasn't offered in '66 according to the brochure and other references I found, but was in '65 with 2x4-barrel (I thought that was just a dealer option, but apparently not). The base Parklane engine in '66 was the 410 cu.in. The Super Marauder was the 428 cu.in, single 4-barrel. The brochure shows the engine in red and black. Like Doug shows, I thought all Ford engines in '66 were blue (brochure artistic license?).
The AMT kit box art, 2004 re-issue, shows a stock single 4 barrel air cleaner, but doesn't show it in the instructions. My kit is open but still sealed in the bag - I couldn't see either the single 4 barrel manifold or the stock air cleaner, just the 2x4 manifold and air cleaner.
Just to add to the confusion (or maybe to create some), I have this box with the blue pro-modeler label, kit #85-5937, and it has the old incorrect body. They apparently changed the box-art before changing the body.
John - yeah, that horizontal blob of plastic is suppose to be the exhaust manifold, and as you discovered this kit doesn't have the cross over pipe. A better example of what you're trying to achieve is the AMT '49 Mercury engine:
or the Lindberg '53 Ford:
I get my coupons in the Sunday paper (full page ad). Or you can get them on line. http://www.hobbylobby.com/weekly/weekly.cfm?page=1&menu=1
They have the 40% coupons about 3 times a month. Each coupon is only good for that week.
Harry - measure your frame from the center of the bottom bracket to the top (or center) of the top tube along the seat post. It is probably 25". The 27" is the wheel size. The largest frame Motobecane lists in their '75 and '79 catalogs (the only "mid 70's" catalogs I could find on line) was 25". However, I do (vaguely) remember ordering some very large frames (larger than the usual 24.5-25" everyone else offered) from one of the French importers back in the 70's. Can't remember which one, but it wouldn't surprise me if it was Motobecane.
FORDSVTPARTS - sorry, but your Peugeot is a AO-8, not a PX-10. http://cyclespeugeot.com/1970-1979PeugeotCatalog.html