Posting the cylinders is better than a block gaurd but is nothing compared to sleeving the block.

Once sleeved, your cylinders will be able to withstand 40+PSI of boost. All of the big dogs sleeve their blocks for a reason. True, you can have 500HP on a non-sleeved block, but I won't last as long as a sleeved block. And when I say sleeved, I am talking about Golden Eagle or Darton Sleeves.

I'm sure once you have this beast up and running your going to beat the hell out of it and enjoy the power you paid for. The last thing you want to worry about is a cylinder cracking and having a 700HP car that you can't drive hard because you're scared something will break.

If you are going to go all the way, do it right the first time and forget about it.