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Recognizing a TH400?

MaxCrack

1/2 ton status
Joined
Apr 10, 2001
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Location
Mt View, CA
So how do I know what is behind this 454? They came out of a 1973 2x4 Suburban. Besides that I know nothing.
 
th350 will have a square pan with one corner lopped off

th400 will have a pan with 2 corners lopped off
 
400 won't have a kickdown cable, and the vacuum modulator is on the front half whereas the 350 is towards the back. 350 also has a kickdown cable.
 
TH400 has a 6 bolt tailhousing, TH350 and 700R4 have a 4 bolt one.
 
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