In The Netherlands, the CO emissions test does not apply to old cars like ours. Not everyone knows that, and although a long shot, you may want to verify whether there's a similar exemption for your car.
If I am correct (books + car are a few miles away from me + PC) I tune my car to between 3.5% and 4% CO level. The CO level on your car does seem very high. I believe I am able to get mine down to around 2% (which is the limit for newer cars in The Netherlands) but she does not run so well then. I'm not familiar with the hydrocarbons aspect of your question, sorry!