there is way more than enough room for clearance on the plug. the domes in the cool head also turn in any direction but are still at an angle. its fine the way it is. no need to reinvent the wheel. T

The reason its angled the way it is is so when the spark plug fires the flame front does not rock the piston from front to back, it aims it parallel to the wrist pin so there is no rock in the piston. No one wants the piston to rock back and forth at 8k rpms do they??