There are 2 dots cast as little humps on the rod in the center. N/A and Turbo rods are the same as long as they have the 2 dots.
Polish the beams (in one direction) to remove the casting ridge (stress riser), add ARP rod bolts and you have some rods that'll handle 700hp easy. Plenty of people are running stock rods into the 10's and many into the 9's.
I have a ton of rods and Chris McDade does also for cheap.
-GNX7