sheeessuuss.
It is actually an L32 bottom end.
UPDATE----
Last week when we dyno'd, the first pull was around high 600s and the 2nd pull was 725. Friday I put it back on the dyno and made 4 pulls. Pull #1 was around 750. For the next pull, I leaned it out and added some timing and a couple lbs of boost. Pull #2 was 813whp at 22psi. Pull #3 was 843whp at 24psi. Pull #4 was 870whp at 26psi. So far so good on the new setup making power.
Unfortunately, the track visit did not go as well. I had another fluke part failure and ended up destroying my hood.