The electric fan bit is BS. ITS ELECTRIC so it does not add rotating mass to the engine like the old style crank driven ones. having it on (or off) has negligible effects on the engine. Now if you remove a crank driven fan and put in an electric fan you will notice a diff...
I have serious questions about the positive effects of removing the headlight, Two runs is by no means scientific results.
About half of the other things are minimal, might give quicker revs. The rest are a decent start. The one thing that you neglected to mention was motor/tran mounts, not sure which ones are avail on which combo though, these would also go a looong way t odetering wheel hop.
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I'm on a boat.....
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