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Old 01-11-2010, 08:41 PM
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flex plate & torque converter

We are installing a small block 350 and 700R transmission.
The engine builder specified a balanced 350 flex plate. The transmission builder furnished a new converter. The flex plate bolt pattern does not match the converter. Any advice will be greatly appreciated.

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Old 01-12-2010, 12:46 AM
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SBC 350 with the 1 piece rear Main seal Cranks use a Flexplate with a weight added onto it.
SBC 350 with 2 piece rear Main seal Cranks use a Flexplate without the weight.
They come in 168tooth (14") or 153 tooth (12-3/4"). With 10-1/2", 10-3/4" & 11-1/2" Converter bolt patterns. Most aftermarket Flexplates come with 2 or dual Converter bolt patterns.
Which style/size do you need?
168th uses staggered starter bolt mount pattern, 153th uses straight across starter bolt pattern.

Last edited by SSedan64; 01-12-2010 at 06:35 PM. Reason: Spelling
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Old 01-12-2010, 06:25 PM
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gt43

Thank you for the information. We have the one piece rear seal. Will have to check on the other items.
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