Are the blocks swappable from first gen to second gen for jdm B16's?

 

I'm not trying to be a dick, just helpful. Think through your question a little more before you ask it. People will help, but they have to understand what you are asking. So, if you want to ask your question again, but elaborate a little for us, maybe we can help.

 

Lets say I have a second gen b16 and am buying a first gen b16 block, will they swap perfectly? I heard there were a few differences in them and want to make sure that they are compatible.