all F-150 hoods are aluminum. HD/L/Regular 'ol F-150/expy. it may be that they are newer that they'll hold a fiberglass or steel hood up better, but they are all aluminum, and weigh around 22 lbs.
the stock struts are good enough to hold up most aftermarket fiberglass hoods, which weigh around 40 lbs. the stock hood pretty much flies up when you open it, where the fiberglass ones need to be lifted all the way open, but they stay open with the stock struts.
the steel hoods are around 50-55 lbs and reflexxons who is a big steel hood company ships their hoods with bigger thicker struts tos wap out. the chikenears billet covers wont fit over them, but if you ahve a steel hood its pretty much the way to go if you want your hood to stay up
so i'd give reflexxons a buzz and order a set of their struts
as for the shaker hood...definately fiberglass with internal baffling/chanels to route the air through the shaker and over the airbox. 100% functional!