I would not use those Transdapt adapters. They are just cast aluminum and will break if you hit a curb.
However, there are billet adapters that work extremely well and are very strong. Look at the ones sold by Spidertrax for Jeeps, as an example. That's the type you should look for.
I have a set on my 66 Mustang so that I can run late model wheels. Fits great, no danger of breakage.