Nice buld man! I had a B18B1 fully built as well, but it was a little more agressive and was shooting for 200+ WHP with mid to high 13 sec. times at the track. After realizing it wasn't going to do what I was hoping for, I got rid of it and went with a built B20VTEC motor, but I do understand why you chose the LS and the mods you've done to it. It is certainly different ad respectable!
Out of what I read in this thread, you will want to do oversized valves and that may justify a bored IM or an aftermarket one plus a large TB. You can get more out of that motor with a little higher compression but I don't know if you wanted to do that or not. A serious port & polish job on the head will help you out greatly. As for degree'ing the cams, just put some adj cam gears on there especially if you're going with the 404's like you mentioned. Uh I think that's it for now. I do still have some parts for the B1 laying around if you need anything.
Nice build!