Thread: 1964 gmc timing chain
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Old October 2nd, 2015, 02:28 PM
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Default Re: 1964 gmc timing chain
Hotrod:
I believe the difference is the early chains are the type used on gears vs. the later chains are the type used on what I would call sprockets (ie. like a double bicycle chain). You can interchange them in the 305's as long as you have the right gear for the early chain or sprocket for the later chain. My 305 E had the early "gear type" when I opened it up, thus I believe it was changed along the way. I changed it to the "sprocket type".

Hope that helps. Pete Chronis would be the expert should I have missed the mark.
Regards,
Steve
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