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how do you tell the difference between a 400 crank and a 350 crank

 
robb-dogg
I love my Chevy Chevette!
Posts: 1
Joined: 02/11
Posted: 02/21/11 05:44 PM

I baught a motor and it turned out to be a 400 how can I tell if it has a 400 crank or a 350 crank in it with out having to tear the motor apart?  

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tuffnuff
Moderator
Posts: 272
Joined: 01/10
Posted: 02/23/11 06:59 PM

The crank flange on a 400 has a dowel between one set of the 6 holes.,. this orientates the flexplate, which has a balance pad on it.
400's are externally balanced, 350's are internal.
Main journal size is larger on 400.

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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