I too am concerned about the tires coming apart. Supposedly their (Hurst's) re-cap process is a different form than what is used on the big rig re-cap (re-tread) tires commonly seen scattered on the highway. I agree with Rick that i'm leery of the damage caused from an old tire coming apart.
I don't know why they use old tires when you can start with a brand new inexpensive radial and re-cap them instead. Keeping cost down i'm sure, but it seems better for safety sake to start off with new instead of an old carcass with an unknown history.
I also wonder how hard it is to balance a set of these tires. My car will be driven, not just a show car, so driveability is a big concern especially at HWY speeds.
The problem I have with the "brand new construction" cheater slicks being offered out there, after price of course, is that I personally don't like their look or large overall width sizes.
The Coker Firestone slicks to me, just looks like a worn out snow tire. Ugly. I think the Rader M/T one's are cool looking slicks, but again the width sizes offered won't fit in my stock '56 wheel well. Also, if you go to a cheater slick style it's hard to get just two plain grooves. You are forced into some kind of tread design like crossed checkered flags for example. Ugly. Again, just my personal opinion. I wish M&H would reproduce their original pie crust twin groove 7" slicks.
Anyway, here's a good story of the Hurst re-cap shop in action. Don't forget to check out the picture gallery on the right margin of the web page. They claim their process holds up.
http://www.streetrodderweb.com/tech/1009sr_hurst_racing_tires/index.html
Bob