For a 3400, you might get by dropping in some 28 lb injectors without a tune, and buy a low priced scanner to erase the first code if it sets an SES. It's never good to leave gas in a tank for long periods, but alcohol is worse for long-term storage. I used a couple tankfulls of E85 in Denver without problems just normal driving. My fuel lines and filters were clean to start with, though. If we had it here, I'd use it.
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