On very calm days I have used a 12/0 weighted treble hook to hold my 31 foot 18,000 pound boat in 60 feet of water. When I was ready to leave I simply powered off and let the 100 pound test line break. But in any sort of wind, current or sea you need weight.
Before I can answer your question, I need to know how deep the water is where you are anchoring? What conditions you'd want to handle? What is the ground composition around the wreck? How much rode to you have & what scope you plan on letting out? How much chain on your rode?
Contrary to popular belief, it is the chain that gets an anchor to the bottom and properly situated. I have anchored on over 600 feet of water using 1,000 feet of line, but I had to move up to 50' of chain with a 26 pound anchor. I had 25' of chain but we let out all 1,000 feet of rode and the anchor never hit bottom. The 50 did the trick. Since then I scaled down my anchor line to a thinner 1/4" too. I was using 1/2" and this just grabbed too much current (& used up a ton of space in my anchor locker). So I would add, what is the diameter of your anchor line?
Also, with a grappling anchor such as you are asking about you typically use far less chain. I have 6 foot on mine. But my wreck anchor is a home made monster that weighs around 25 pounds.
Without answers to my questions, I would say with 6 foot of chain (that will also help protect you against loss due to scraping on sharp objects) this anchor should be ok in calm conditions. But if a boat comes by and wakes you, it may pull out without a bit of scope.