Are all SEC hoods Aluminum? If I find a SEL with a SEC type hood in the yard, does it mean it was switched or is there an SEL hood similar to the SEC hood? If so would that one be steel?

Thanx

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)