timing trouble sb 305 chevy c10 help plz?

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drop and destroy

New member
i hsve a 305 that i just put a cam in and didnt have any trouble with it till i changed my intake edelbrock performer is whar i put on and now the truck is timed dead center but still back firing threw the carb. and wont rev up to 2500 without backfiring really bad help plz
 
well dude im not quite sure if i can help but on my bronco if we time it to specs it doesnt run right because of the cam and all the other performance parts i have on it so try timing it by ear and see if that helps
 
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