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06-10-2010, 09:44 PM
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4.3L and 305 timing covers 87-up
look identical to me
ive got one of each side by side and i cant find a single difference in them. a '91 305 one and a '92 4.3L one., both truck ones,,, so they are the exact same thing right? always wondered... 
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06-10-2010, 10:09 PM
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Yeah they`re the same. The change was made later on when they started using plastic covers.
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06-10-2010, 10:24 PM
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ohhhhh i forgot about the later plastic stuff wow
good call there! thanks
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06-12-2010, 03:52 PM
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The 92-94 4.3L 'W' CPI engine has a balance shaft and has a metal timing cover which is different than the non-balance shaft 85-92 4.3L TBI/carb timing cover which is the same as the V8. I believe the plastic timing cover is from early 95 and up.
Just posted this for info purposes.
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06-14-2010, 12:32 AM
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well the 92 up vin z also got balance shaft
91 older dont have, like my 91 vin z out here that is my DD but anyways my original posting Q is answered here, both the 4.3L vin Z, and the 305 tbi vin H from the other truck both have same timuing covers nice info to learn /know  thats all i needed to knwo really thanks!! gm did away with/modified many things like this in the 90s and early 00's Last edited by fast68; 06-14-2010 at 12:54 AM.
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