Why hasn't anyone released a HD truck with a Turbo V8?

OK, a Gas tow engine...

a straight 8, Aluminum, with a locking ring. *like used on E-locker* between the first 4 and the second 4 cylinders.
supercharged, injected. ceramic coated cylinders. and Variable compression.

all accessories are electric driven...or driven off the flywheel.

8 going up hills and 4 the rest of the time, or when needed.

note the front 4 would stop moving when not needed.

unlike other cylinder killing setups.