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Old 10-08-2006, 03:33 PM
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5.0 help on flexplate

i
have a 78 cobra putting a 87 5.0 trouble is it uses a 143 tooth flexplate 28oz it has a small bellhousing to clear the headers can any one help. thanks ron.
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Old 10-08-2006, 06:07 PM
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D5ZZ 6375-A A/T 141T 9.25 Convertor Mounting Circle

Small block reciprocating assemblies have some balance. The compact lightweight crankshaft itself does not carry enough counterweights to achieve zero balance. Extra counterweight is cast into the flywheel and harmonic balancer bringing the entire assembly into neutral balance. Early engines use 28.2 oz.-in. external balance, while 1982 and later engines use 50 oz.-in. flywheel and 34 oz.-in. damper external balance.
You are going to have to have the origional flexplate balanced to 5.0L specs.
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Old 10-08-2006, 09:52 PM
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There is a special flexplate that lets you use the c4 with a 5.0. They have them on summit but I forgot who makes them.
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Old 10-09-2006, 05:20 AM
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Originally Posted by 1969NovaSS

There is a special flexplate that lets you use the c4 with a 5.0. They have them on summit but I forgot who makes them.
The MUST II has a very small housing as it has to fit within the confines of the MUST II tunnel. The one you are thinking of is the 157/164T. He would have to modify the trans tunnel to fit a normal bell housing.
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Old 10-09-2006, 11:36 AM
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a 157 tooth and a 164 tooth bellhousings the difference is in the starter on the 157 is more inward towards the block thats were i have a problem with the 164, but you say your hitting the bellhousing?
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Old 10-09-2006, 09:47 PM
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whoops. Forgot that year was still the mustang II's. sorry about that.
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