Chris,
Look at your heads, The M&A heads (stageIII's) don't have steam holes in the heads......so you won't need them in the block.
I ran into the bolt/stud problem and CV Products set me up with the 4 different length studs I needed. No kit was available. It cost a little more, but I got exactly the right sizes. If you want to go with studs, I can give you the ARP p/n's