[Accelo]

Thanks for the excellent write up.
Some L86 engine background information below;

The L86 is a Gen. 5, 6.2L, small-block engine powering 2014-present GM trucks and SUVs. They are known as the EcoTec3 6.2L engines.

These engines use a longer intake runner than its cousin, the LT1. This helped the L86 produce peak torque 500 rpm sooner than the car version of the 6.2L engine. However, it falls about 35 horsepower behind the LT1 at maximum output.

The L86 engines are all-aluminum, feature Active Fuel Management (AFM) and Variable Valve Timing (VVT), and are Flex Fuel-capable (E85).

The engines also use direct fuel injection technology, which shoots fuel directly into the combustion chamber instead of the intake runner.

The information listed here is for a stock engine.
L86 Engine Ratings
Compression Ratio 11.5:1
Horsepower Rating 420 hp @ 5,600 rpm
Torque Rating 460 ft.-lbs. @ 4,100 rpm