Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.

The typical 4.15 stroke sizes:

4.375x4.375x3.14159265/4x8x4.150 = 499.1 CID
4.380x4.380x3.14159265/4x8x4.150 = 500.2 CID

And in a 440 block you see 4.320+0.030" bore = 4.350"
4.350x4.350x3.14159265/4x8x4.150 = 493.4 CID