6.0LS + 6L90e is worth?

[swissarmychainsaw]

I'm kicking the tires on upgrading my motor.
Upgrading the motor, why not upgrade the trans too?

I have a 1973 Suburban 350/350/205 which all works fine, but it gets crappy mileage and feels kinda underpowered. Would be kinda nice to pollute less and get better mileage AND have more power.

I found a Ultra low mile 2014 6.0 ls motor & 6L90E trans. but the guy is asking $8,000 for it. Comes with all accessories:
ECM, wire harness, All engine accessories (AC), PIM module & APP Sensor.

I found plenty of cheap 5.3 motors, but when you do the math after you buy all the "Small" things, you can probably get to close to half this number (for a stock 5.3!)

Not sure if the 6L90 is 4wd or 2wd or if that matters?