port & polish the head, port matching intake/exhaust, better oiling system to reduce friction(dry sump vs wet sump), stronger spark, a rearend with a gear ratio that matches the engine power(higher usually gives more torque(acceleration) but less top speed, also goes along with the drivetrain).
but you got most of it
1993 nissan 240sx hatchback(stock) <<drifter, straight liner, road courser
"Horsepower is the force that determines how fast you hit the wall. Torque is the force that determines how far you take the wall with you after you hit it."
"Horsepower sells cars, torque wins races" - Carroll Shelby
"Real cars don't make power at the front wheels....they lift them."