A coworker of mine said his father made a hoodscoop for his 70's model ford truck. He had an extra hood, he cut the middle out, and put the 2 sides together so it was about 18" wide. All the lines match, so it kind of looks like a factory option.
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1993 F-250 HD XLT Lariat SC 4X4 7.3/5spd ATS Turbo
173hp/335tq
1986 F-250 HD XLT Lariat SC 4X4 460/C6
1985 F-250 HD XLT Lariat SC 4X4 460/5spd
1974 F-250 HD 2wd-360/C6
1967 Ford Mustang-351W/4spd