Making a block act like a furnace (kind-of)

I have very little understanding of how the mcreator procedures actually work, I'm familiar with programming and have used it before. So I basically understand the syntax of these procedures, however I don't really know what to use to make a lava furnace.

Could someone please put together instructions on how I could create this block

The block requires slot 0 to have a lava bucket in it, and slot 1 to have at least 1 cobblestone block

It then gets rid of the cobblestone and puts 1000mb of lava in it's liquid storage

Also just in case, do I have to do something special to get liquid out of the block using pipes or things like that or is that just a feature of liquid storage