Fred and Dave from Dirt Every Day wanted a luxurious Cadillac that could also go off-roading. Their solution was to purchased two tired seventh generation Eldorados and stuff the powertrain from one into other making a twin-engine gas guzzling monster they call ElDIRTrado. The project consists of a 1976 Eldorado with a 500 ci V8 with three-speed automatic in the front and the identical powertrain in the truck taken from a 1974 Eldorado. This gave the the car a total of 1,000 ci, about 380 horsepower, and probably 5 MPG.
Source: Dirt Every Day
This same concept was recently debuted in a LeMons car. Love the idea