After refreshing up my motors ignition parts and carb, it all sounded as good as usual. The last step was a new cap and rotor. After installing them, i fired it up to make sure all was good, and i picked up 200 more R.P.M ,is it possible that i have less resistance now ? I never had a cap and rotor make a difference before. I have a Delco HEI with a MSD box. This is the first time used an MSD cap.