If you search for "fast block place mod 1.8.9 download," you will find countless sketchy files. Here are the safe, optimized options:
Essential for "speedbridging" or creating large walls while running; you no longer have to time your clicks perfectly to avoid missing blocks. fast block place mod 1.8.9
If you are looking for a standalone mod file to use in the Forge mod loader, the most common one is simply titled or is included in impact or Wurst (though Wurst is usually later versions). If you search for "fast block place mod 1