Just as a heads up, my Graphite 6 with a 181 crank pulley (is that equivalent to a 65 S/C pulley ?) would run extremely lean at WOT even with a Eurocharged tune. I had to fit Needswings fuel/zeitronics kit to get the AFR under control.
If you never had it dyno'd or had nothing to check the AFR with............running lean is definitely a possibility, and that in turn can cause engine damage........ :O(