I have a n/a 6 SPD and looking to build another engine. Wanting turbos over a blower.
Turbos use half the horsepower to boost then a supercharger requires and turbos have more tunability and drivability.

I only drive it 2 days a week and some on weekend but still put on average 600 miles a week.

3.2 and 3.7 m112 engines have a forged crank and rods. I have heard the factory forged lower end is good for around 90 HP per cylinder. But the coated pistons will have to go anyway.