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Old 05-17-2018, 02:31 PM   #1
philB
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Join Date: Oct 2012
Location: new orleans, la.
Posts: 217
Exclamation flex plate for sb/bb

not sure what were looking at, using a 200 hydro trans, can a sb350 use a big block flex flywheel, one peace rear seal.
and not sure what the 200 trans. is between the TH350 and 400
just learning as we go with this project.
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Old 05-17-2018, 11:09 PM   #2
Captainfab
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Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: flex plate for sb/bb

If the big block flexplate is for a 454, it can not be used on anything but a 454.
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Old 05-18-2018, 08:49 AM   #3
b454rat
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Join Date: May 2004
Location: Binghamton, NY
Posts: 3,453
Re: flex plate for sb/bb

Mihht want to look into another trans, that 200 is pretty much the runt of the litter, smaller than the th350. Used in cars only, usually V-6s and small V-8s and not very strong.
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Old 05-19-2018, 10:27 AM   #4
kwmech
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Join Date: Mar 2003
Location: Colfax-California
Posts: 8,389
Re: flex plate for sb/bb

It is all GM. Use the flexplate that goes with the engine. The torque convertor bolts should line up on one of the sets of holes
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