Look into bearings and low friction fluids. I've also changed to 0w20 synthetic. I'm thinking about going with something lighter in the transmission. Haven't done any real research but better wheel bearings may buy you something.
Risky option: Since I've also pulled 140lbs of sprung weight out I was wondering if I could get away with a smaller/lighter rear drum or disk setup.
Sorry no real data. Just got a scanguage so any future changes I'll keep track of impacts.
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