running lean and chops without a cam

I have a 2006 silverado 1500HD that had a 6.0 with a 4l80e. the 6.0 took a dump and all i had at the time was a 4.8 out of a 05 silverado. i swapped the 6.0 for the 4.8 and used the factory harness along with all the same sensors. once i finished the swap and started it the idle was extremely high so i replaced the throttle body with the one from the 05 silverado that helped it however it was still sounding like it was cammed so after some research i found that the maf sensor could be the culprit due to it having the parameters of the 6.0. so i went to the tune repository and found a "stock tune" from a 2004 chevy express with the 4.8/ 4l80e combo and segment swapped it. that still didnt fix the issue so i bought a new maf and that didnt fix it either however i found that when i run the truck without the maf sensor it idles fine and i have less issues. it still runs lean but not as bad. Here are the specs of what is in the truck along with data log and tune file.

2006 silverado 1500HD

Tune AND data log
Engine: 4.8
Axle gear ratio: 4.10
Tire size: 35x12.50R22
Computer: P59
Operating system: 12592618
Heads: 706
Transmission: 4L80E
Torque convertor stall: Stock
intake manifold: Stock intake from 6.0
Intake tube: Stock box
Air filter: Fram
MAP part number: 213-4434
MAF part number: AF10043
Injector part number: 17113698
cam used: Stock 4.8 cam
exhaust type: Long tube 1-7/8 headers no cats
pistons: Stock 4.8
compression: Unsure
throttle body type: Stock DBW
Fuel pressure at idle: 58PSI

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