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fwiw, i have a 239/242 .603/.609 but only on 113 or 114 lsa. i also did a ported TB and 37# injectors, along with ls6 heads and LTs/full exhaust....
and i ran it on the stock tune for quite a while.. actually ive even raced it hard on a close to stock tune(just injector sizing adjusted), and no issues. It'll get tuned in sept finally though.
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