Curious which gearbox this is? I was told it was an rb25 rwd gearbox but by the speedo gear location and type has had me real confused, at least I havent seen one like it before online, it uses a short speedo gear or at least thats what was installed when i got it. That short speedo gear had a screw on part to make it electric. It came with the one on the left with the blue cog.