Aren't the head studs the same for any FE block? I don't recall seeing a special ARP stud for alloy blocks. I could be mistaken. As for the main studs/bolts, it could be a touch more because they are 6-bolt mains. Or they could be a touch more because they have "Shelby" attached to them.
With an iron block, you still have to pay for the big bore option. Extra machining is common to any unfinished aftermarket block that you buy....same with testing, fitting, etc. So it's not like you have to pay a gazillion dollars extra for "accessories" on an alloy block. You just pay for the aluminum.
Pond makes a better block IMO...and they're less expensive.
Lastly, you don't need Shelby heads with a Shelby block. Edelbrocks, Blue Thunders, or old casties will work just as well.
I apologize, but I didn't see any tongues in cheeks on your previous posts. I'll keep my eye out from here on out.