I was wondering if there were any companies that made stroker cranks for the 400 small block. Or is it even possible to stroke one of these engines. If so, how many cubes can you get out of them. If you could please tell me the companies that make stroker cranks that would be much appreciated.

 

I think the useful practical limit of the 400 tops out around 434ci (that's a 4.155" bore with a 4" stroke). There are companies that make stroker cranks and even brand new aftermarket 400 blocks that are a LOT stronger than the origninal factory castings. You'll spend a lot of money on them, though, and they are NOT a bolt-it-together-in-your-garage kinda proposition.