Less fuel is not the only key. The car still stalls out and runs rough even after I dial back the fuel. I don't have a timeline light here at the show in Reno so I can't acuratly advance the timing. Any other suggestions?
Buy one... lol seriously your engine is starving for timing advance, you might get by advancing it by ear but then you run the risk of going too far and hitting detonation. What are your timing specs at home at sea level?
FWIW my 360 likes 16* initial, 35* total (not including vacuum) at 5500 ft. elevation here in Denver. And that's with Magnum heads and a mild cam, with older open-chamber LA heads your 340 will want even more.
