Of course an aluminum front made by Randy would be ultra cool and light. But other than that, I have to tell you, fiberglass would likely be a big waste of money.
Let's start with the weight issue. A fiberglass front end will only be a few pounds lighter than the steel. Unless it is a "race weight" product that is very thin with limited reinforcments, it just doesn't save that much weight. Those lightweight fiberglass set ups are a nightmare on a street car and are not going to last.
Unless you are draging your truck and have it down to running a very consistant time within a tenth of a second or so, you would see NO difference what so ever. More over, without that consistant time, you surely couldn't measure how much better it was.
The thing is, it ain't worth the money or trouble.