Cleared the tune, started over, new sensor, she runs well. Added base fueling, set it to target a bit richer. I do think a longer throttle arm would help on part throttle use to make it easier to dial the pedal travel in. I set startup timing to 20 deg idle and cranking, WOT to 33 deg, on pump premium 93 E10 winter blend, which according to my 2009 flex fuel Suburban is 25-40% alcohol...
The Chinese plastic radiator #2 is leaking when cold (I suspect thermostat isn't open and waterpump puts out too much pressure for the Chinesium clamped alum plastic to hold it. Brand new, garbage. I think I'll go full alum made in America now. Had one in my 87 GN, big money, but at least it didn't leak when new. - EDIT - It helps to actually tighten the upper hose clamp - no leaks now...
I added Moroso spark plug wire separators bolt off the stock valve covers.
Painted the 454 valve cover emblems black, then sanded the 454 shiny. Turned out well I think. Removed the air filter tube to pull vac from the driver side valve cover.
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