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I need some serious help, I just install a 350 sbc engine on my 69 camaro, I use the same tranny (400th) with the same torque converter and flex plate wich measure about 13 1/2 inches if I measure it right, my problem is that went I try to start the car the starter will make a loud noise and it won`t disingage from the flywheel. I try shimms all possible ways, three or four different starters, one for a 327 , 69camaro offset, another from a 70 camaro offset, a 350 chevy camaro in line wich did not fit on my car, and I even try a starter from a 69 , 396 big block wich off course I broke the ear some how. I was contemplating buying a mini starter but i figure it might give me the same problem. The starter came from my other engine wich was a 327 from a 68 corvette engine and it was just rebuilt prior install in the engine, and no my flex plate is not back work `cause I marked it before I remove it. I am dreading this but should I be looking for another flex plate , and should I go with a 168 tooth or 153 on a turbo 400?. Never in my life I had so much problem with Starters.
 

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Why did you find it necessary to change the flex plate? Did the engine come without one? Was it bent? The flex plate that was originally on it is the size you need. Flex plates aren’t designed to match trannies, torque converters are. Flex plates are designed to match the starter position because that’s what it’s bolted to.
 

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Is everything grounded good? If the starter isn't getting the voltage it should use a multi-meter and see if the voltage drops when you try to crank it. This will cause the gear to hang. trust me I spent about 3 hrs dicking with a starter because the motor wasn't grounded properly to the fram where I had my battery ground...had the exact same symptoms you describe.
 

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BBCMudbogger said:
Is everything grounded good? If the starter isn't getting the voltage it should use a multi-meter and see if the voltage drops when you try to crank it. This will cause the gear to hang. trust me I spent about 3 hrs dicking with a starter because the motor wasn't grounded properly to the fram where I had my battery ground...had the exact same symptoms you describe.

X2 on this one!!!! Electrical diagnostics is the easiest way for something to malfunction, and yet it is the most overlooked. Try checking all your grounds and connections with a voltmeter/continuity tester (test light) until you come to a consensus on what the problem is
 
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