I always find it important to have inspiration when learning new skills. I’m currently trying to train on CNC mill work for the EV conversion project and I remembered this video from Kirkham Motorsports a few years ago. Kirkham Motorsports produces state of the art aluminum monocoque Shelby Cobra replicas as well as their own CNC billet aluminum 427 engines for them. They posted this 3-part series of videos to YouTube detailing the entire process starting for a giant forged aluminum block.
Part 1: Machining the Engine Block:
Part 2: CAD and CAM Demonstration:
Part 3: Machining the Bottom End Girdle:
Source: Kirkham Motorsports on YouTube