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Discussion Starter · #1 ·
Just put a Edlebrock 750 on my 429 and it runs like hell but having pinging on acceleration-tried richer and leaner to no avail. Should I retard the timing now? 8.5 -1 compression-ran reg. gas before with no pinging. Thanks
 

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Do you have Vac advance? If so, is it on the proper port?
 

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Discussion Starter · #5 ·
Normal acceleration. Talked to a mechanic today-he said try retarding the timing and if that doesn't work, use a higher octane gas.
 
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