New motor need help please!

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79cutlasssalon442

Master Mechanic
Jan 25, 2012
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We started my new 350 last night. 350 .040" over. Vortec geads and a xe268 comp cam. We started it, fired right up. Rockers started ticking because they were loose and then this popping noise started. It isnt popping up out the carb but if you cup your hand over the carb it quiets it down. Sounds like it's in the intake. And gets louder with rpm's. Could this be from the rockers being too loose? Someone told me it could've been a tight rocker too.
 
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