I took on the job of putting in a kubota engine off of a carrier cooling unit in a caterpillar hoe, never again
Had to keep the pump in the same spot so there is not much room up front
Made a shim out of 3/4 flat bar to keep the distance the same for the pump drive
Then had the kubota flywheel machined to except the cat coupler
A better pic of my spacer I put together
got it all together and running right
All in all,its twice as strong as it was,and that's just because there's no P O S cat motor in it