There was a diesel lakester being built locally. Not sure on the status.
Last I heard, the general consensus is that there is no need for more class expansion, and at a minimum, you'd need 3 cars to start a class.
My thoughts have always been to build what interests YOU, that way if you don't set a record or win the race, you still have a car you enjoy.
If you need any diesel advice concern late model pickup engines, I'm always happy to help.