UPDATE: Engine codes

Finally for the first time driving home today CEL came on and my scanguage showed P0440 (evap emission control) and P1135 (air/fuel heater circuit bank 1 sensor 1).

So...he mentioned it was running lean. Could it be that exhaust valves are out of adjustment, so they're being held (open?) causing those cylinders to run lean?

I say this because upon original cylinder head removal, I had three cracked valves, all exhaust I think. Both on cyl 4 and one on cyl 6. So those would have to be new, then ground down. If there was any error grinding those down then the original pucks could be out of spec...right? I'm searching for possibilities here. And those two cylinders just happened to be the "coolest" on my hot soak test.