I will update you on my LS build here in the next month or so as to whether I pass smog. Here are my mods:
Block:
Crank: Stock
Rods : Endyn-spec Eagle long rods, courtesy of Calesta (Mike)
Pistons : Custom CP 81.5mm, raised wrist pins, extra light wrist pins
CR: ~ 11.5:1
Head:
DIY pnp with polished chambers
Rocket Motorsports Valve Job: Multi-angle intakes; Radiused Exhausts
RM Valvesprings
RM L21 Camshafts
Modded pr3 IM, portmatched to the ls head
I will also be ordering injectors, but have not yet figured out how big I am gonig to go yet. As for programming for obd0, I'll be using turboedit, as it is still supported, at least at the last time I checked. I am aiming to pass smog, and will tune two different chips; one for smog and one for the engine to run right
I'll let you know how it turns out. I should be up and running by march.