How many items would entail “all of it”? Just curious if you could break it down at all? Or is there an engine building book you recommend that I could learn from that goes through the process of a decent design?
Cooling system, ignition timing and curve, carb selection/tuning, flywheel weigh (for those of us who can operate 3 pedal cars) and chassis/suspension.
All of that conspires to allow unorthodox compression ratios.