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Old 12-18-2015, 05:42 PM   #9
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
Re: TH400 behind a 350 OEM, when and why?

We know for sure no TH400 in a 4x4
Big Blocks w/M49 would be TH400

I would have thought all automatic C20's would be TH400

The sheets I've download off of the GM heritage site it looks like the TH350 might not have been officially offered until the 1970 model year. I think the TH350 started in the Camaro and once units were available it went into other GM products
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