Belts, Clutch Machining, and Springs... Oh my !!

[BearsFan315]

Been doing reading, research, and such and see what MODS for power/ speed for my 2008 gas Club Car:

1-Machined Driven Clutch

2-Severe Duty Drive Belt

3-Spring (POWER KIT)

What is the Pros - Cons to each of these ??

Which ONE is the biggest bang for the buck ?? Talking ROI Here !!

What is the best two combination of the three ?? or go all three ?? does anyone haev all three and worth it ??

Most importantly IF you do a BB Conversion do these transfer over or no longer applicable or usable ??