There is no replacement for displacement.
There are no truer words spoken for the exciting if not unusual form of motorsport that is tractor pull. Attach tractor to sled and pull it as far as you can down the dirt track. All while the weight on the sled is moving closer to the front making it harder to pull it.
Many classes exist in this type of motorsport. Multiple engines are not uncommon and most are a far cry from what a "tractor" really is.
Check out the video of "Blown Income" driven by owner and builder Brett Harris. The rear wheels for this beast are 16.1" diameter. Made from 4mm 6061 T6 aluminium. Enjoy the ride.