G16 driven clutch replacement

[fixitforfree]

I pulled my G16 driven clutch and will replace the sliding sheave, spring, ramp shoes and belt. Should I also replace the fixed sheave or will it make a difference at all. My clutch has the typical growl and the ramp shoes and sliding sheave are well worn but I don't want to throw money at it that isn't needed. Also, my cart has a basic 4" lift kit and 18" know by tires. Is the Jakes power clutch kit the way to go for more low end torque or is a stock spring in the correct holes (C4?) work just as good? Thanks for any info