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Old Flywheel on 5.3

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Old Feb 27, 2005 | 06:59 PM
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Default Old Flywheel on 5.3

Quick question: Will the flywheel off a 77 350 work on a gen III 5.3? I am aware of the difference in backspacing that requires a different pilot bearing. But will the 350 ring gear match up with the 5.3 starter?

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Old Feb 28, 2005 | 07:41 AM
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Old Feb 28, 2005 | 08:13 AM
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There's no way it will bolt to the crank, the center hub and bolt pattern aren't compatible.
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Old Feb 28, 2005 | 01:07 PM
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Ditto!

I just found out the hard way too....
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Old Feb 28, 2005 | 06:03 PM
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How about a later small block one that has a one piece rear main? Has any one tried one of those?
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Old Feb 28, 2005 | 08:08 PM
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the later one peice seal flexplate will slid onto the the hub of the 5.3, but the bolt circle is different. they are close, i thought about drilling the holes out but decided to buy a new one correct for my 6.0L.
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Old Mar 2, 2005 | 09:06 PM
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What about having a machine shop cut the center out and weld in the correct center?
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Old Mar 2, 2005 | 10:39 PM
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why not buy the correct flexplate for the correct engine if your willing to go to all that trouble.
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Old Mar 3, 2005 | 05:04 AM
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Originally Posted by BSchroeder
What about having a machine shop cut the center out and weld in the correct center?
Well shucks, why not just weld the tranny input shaft to the crank so's ya don't even need a flywheel?

(binga binga bing bing binga binga bing)

I guess just buying the right flywheel is out of the question...
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Old Mar 3, 2005 | 06:35 AM
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Originally Posted by crainholio
Well shucks, why not just weld the tranny input shaft to the crank so's ya don't even need a flywheel?

(binga binga bing bing binga binga bing)

I guess just buying the right flywheel is out of the question...
It's not out of the question, just more expensive. It also makes sense to me to try to reuse a bunch of parts that are in pristine condition.
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Old Mar 3, 2005 | 02:11 PM
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Originally Posted by BSchroeder
It's not out of the question, just more expensive. It also makes sense to me to try to reuse a bunch of parts that are in pristine condition.
Just put them on eBay and make sure you put "RARE" in the description, you'll get top dollar.
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