you made a mod from it and you can do it a lot esear.
1. you go to the java files.
2. find the file "CraftingManager" and open it.
3. schroll down until you find the recepi for the gold block.
4. chance it in wat you want.
5. save it.
6. test it.
7. exprot and put the class file in you normal mincraft in the .mincraft file
done
