If they fly well out of your bow, are still sharp and are legal in your state then use them. My only concern would be durability. The blades don't have any support for the trailing edge. That is why they are called "Chuck-It". They were fairly cheap back then and weren't meant to last a long time.

Bass Pro has some broadheads on sale for their fall classic. I see Muzzys, Thunderheads and some Tri-Loks from Easton that you can get 3 for $15. These might be better to use.