The C&D Pinto article is currently readable in scanned images in this eBay auction:
1974 FORD PINTO "Crisis-Fighter" ORIGINAL 1974 ARTICLE:eBay Motors (item 350168538404 end time Sep-17-09 07:59:49 PDT)
As for the poor initial MPG figures, I was just repeating what Car and Driver noted. FYI they used the 2.0L engine with the automatic transmission. At 70 mph, I don't have trouble believing the slushbox - probably a 3 speed? - would get pretty dismal mileage.
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The air dam's A-B-A coastdown data is (are) crunched, and it appears to have helped. I'll post the gory details shortly.