don't bother i have built and riden on lots of 103's wheni was at the dealership and the best runnig bikes that impress me the most are always 95 high comp with a good cam and some head work. One of the best was a dyna that ran the dual holley carbs as well and the 1/4 turn twist cams on it. now that was an HTTC full set up
Why not just do some head work and Put in a set of cams that match up with the heads and bump the compression up a bit. Then your 95" would eat up a 103" with no head work. Plus you'll save $$$$.....................
With no cam or head work and only a displacement change, you wont gain in overall power, it should just shift the RPM range lower. Which could be a good thing
I am thinking of doing mine over the winter, I'd be happier in 6th I think