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Rocker arm year difference
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irish13jeff View Drop Down
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    Posted: Jan/10/2019 at 6:16am
what’s the difference and are the rocker arms themselves interchangeable?
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 6:22am
I purchased a crown rocker arm set 3242393k for a 83 as well as a crown pushrod length set 3242395.
However,the pushrod set is about 3/16 to long . So that being said I’m now second guessing the rocker arm set. Mine to the left seems a bit wider and that has me confused . The motor is not the original nor does the previous owner know the exact year.


Edited by irish13jeff - Jan/10/2019 at 6:29am
Please don't tell my parents I'm a truck driver..... They think I'm a piano player in a whore house...

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matty 401 View Drop Down
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Points: 1727 		Post Options Post Options   Thanks (0) Thanks(0)   Quote matty 401 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 8:54am
maybe they changed the rocker ratio  
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You may have a late model plastic valve cover/small head bolt era engine that the factory shaved about 80 pounds from.
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 10:32am
7/16 head bolts with the long and short bolts combination.The valve cover is aluminum aftermarket . However, my pushrod length seems to be of the 77-80 models of 9.62. I ordered the 81-86 model rocker arm kit so gonna try the early model kit and see if that is more like the rocker arms I have. Any confirmation of my rocker arm year to the left is greatly appreciated 
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pacerman View Drop Down
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Points: 9057 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pacerman Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 11:40am
What do you know about the history of the motor?   The build date code stamped on the block near the distributor is pretty easy to decode.  Joe
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 12:18pm
by the numbers I believe it’s a 1980
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 12:19pm
Driver side off block numbers 
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 12:21pm
Head numbers 
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irish13jeff View Drop Down
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Points: 181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote irish13jeff Quote  Post ReplyReply Direct Link To This Post Posted: Jan/10/2019 at 12:26pm
so if I decoded it correctly Oct 29,1980 is the block date
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