hi im new here my names matt. ive got a ? for you guys. theres a 1990 notch 2.3 new head and new tranny (auto) the guys says hes got recipts for all thats hes done. he says it idles rough and that the timings off . but supposedly above idle it runs good oh and it has a flowmaster. can i fix the timing by rotating the distributer? and is it worth $1000
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