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The harmonic balancer and flexplate are externally balanced on the 400, meaning the balancer isn't smooth and consistent all the way around. The flexplate for the 400 has a balancing weight welded to it. The 350 is internally balanced and has the typical smooth balancer and unbalanced flexplate.
What else can I help you with?
How can you tell the difference between A 350 small block and A 350 big block?
No such thing as a 350 big block.
How do i tell the difference between a 305 tpi and a 350 tpi without looking at the block?
The eight digit in the VIN # will tell you what engine you have. If you have the number 8 it is a 5.7 (350)
What is the difference between 1972 350 block and 1985 350 block?
The strength of the engine block The 72 would be a better / stronger block.
What is the difference between a 283 small block and a 350 small block?
67ci
How can you tell the difference between a Chevy 305 and a 350 by looking at it?
ON LATER MODELS LOOK AT THE REAR OF THE BLOCK NEAR THE DISTRIBUTOR AND IT WILL HAVE 5.0 OF 5.7 CAST INTO THE BLOCK
Difference from a big block 350 to a small block 350?
There is no such thing as a big block 350.
How can you tell the difference between a Chevy 350?
BETWEEN a CHEVY 350 AND WHAT? Ask A question that makes sense !
What is the difference between 1975 350 block to a 1990 350 block?
The 1990 block would have the integrated one-piece rear main seal. Oil pan and crankshaft are not interchangeable.
What is the difference between an 1987 and a 1988 Chevy 350 engine block?
There is no difference what so ever. Same engines.
Can you tell the difference between 305 and 350 by where the timing tabs are?
Yes, the timing tabs on a 305 engine are usually located on the driver's side of the block, while on a 350 engine they are typically on the passenger side. This difference in location can help to identify which engine you are working on.
What is the difference between 1985 350 block to a 1996 350 block?
there is very little difference if any the older might have a mechanical fuel pump maybe a different oil a different oil pump not a whole lot
The different between 350 Short block and long block?
The 350 short block has less power than a 350 long block.
