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  #21  
Old 06-19-2013, 10:19 AM
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wouldn't straight up timing cause the knocking and pinging?
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  #22  
Old 06-19-2013, 11:16 AM
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These engines came retarded from the factory, and the timing set helps wake it up..

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  #23  
Old 06-19-2013, 02:21 PM
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why didn't the factory do straight up timing, sorry for all the questions, I've been playing with the timing and carb settings for a while,

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  #24  
Old 06-19-2013, 02:29 PM
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The 351M and 400 were brought out to be emissions compliant and the retarded timing was to help reduce emissions..


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  #25  
Old 06-19-2013, 02:32 PM
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ahh, thanks Chris
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  #26  
Old 06-19-2013, 03:42 PM
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This sounds like something I should do.
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  #27  
Old 06-19-2013, 03:45 PM
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Yes, look at the horsepower ratings between 1970-1971 and 1975?-1979. There is a substantial decrease in horsepower.

My 1979 w/351M was rated at 137 horsepower.
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  #28  
Old 06-19-2013, 03:48 PM
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Sounds like just the difference of when the valves open and close.
My 400 seems to wind up some what quick but tops out or runs out of breath.
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  #29  
Old 06-21-2013, 01:07 PM
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Late to the party Doug...but yes, it is just that simple. Like replacing any other timing set, except you have the super-dee-duper technical task of lining up the notch with a dot on the crank to the corresponding notch/dot on the cam. If you've never swapped a timing set before, the old set usually needs some persuasion to come off...I just use pry bars against the block. Then sliding them on can get a bit frustrating if the gear and sprocket aren't aligned just right...then it won't want to slide on the crank snout and/or bolt up to the cam.

IMO...the only way to go are Cloyes double rollers. A little pricier, but I always end up ditching whatever 'I just threw on' later. I do have a few spare Comp double roller sets that came with cam kits, I'd like to try...but haven't needed to with Cloyes units installed/reused.
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  #30  
Old 06-27-2013, 01:14 AM
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Thanks, Ben. Is there enough room for the double roller chain without rubbing on the cover?

Also, did you have to do drop the oil pan?
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