Chevy, 408, (actually 408.7) often called 409, is a small block 400, bored out.
Chevy 409 is a big block V8 engine. It was produced by Chevrolet from 1961 to 1965. It was a 6.7L engine, with a single or dual four barrel carburetor.
A 350 .030 over is 355 cid. Chevy made a 348, but that was considered a big block. It was the pre curser to the 409, and was made in the late 50's. A 377, and a 383, are versions of hybrids between the 350, and 400. Cannot say I have heard of that one.
Small block
It is a small block
"The v8 350 is a small block Chevrolet motor.....................it became a big block at 396cubic inches......so anything smaller is a "small" block" this is a little misleading. a 350 is indeed a small block. a 396 is indeed a big block. but you can have a small block that is (internally..cubic inch wise) actually larger than a big block. for example GM made a 400 cubic inch small block. internally it is a larger engine than a 396, but the outer dimensions of the 396 are larger than the 400 small block. and the external dimensions and cylinder head design are what make a small block a small block, and a big block a big block. a small block engine simply has a physically smaller block...a big block is called a big block because it's block is bigger than that of a small block.
That would be a small block.
Your going to have trouble with that one. I remember 1974 like yesterday, but not a 366, big, or small block, from Chevy. If you are trying to say 396, again, trouble, as the 396 had morphed into the .030, version of the 402. There was a 348, but that died with the 409, in 63, I think, then there was the......
It is a small block.
get a big block or bore it 54 over
409 = 409/1
The factors of 409 are: 1, 409.
BIG BLOCK OR SMALL BLOCK DOES NOT DEPEND ON CUBIC INCHES . IT IS THE DESIGN OF THE BLOCK ITS SELF.