I've already replaced all the vacuum lines and the O2 sensor. I think it's likely the CPR, that and the frequency valve are the only original parts in the fuel system now. I'll connect a pressure gauge and test it in the next few days. I've not adjusted the CO mixture yet, I want to be sure that everything else is working correctly before doing that, my car still had the original factory seal on it when I got it, I've already drilled it out and replaced it with a bung ready to do the adjustment after I know everything else is in spec. Out of curiosity I did connect a dwell meter to see what the measurement was but the dwell was stuck at 87-90, not sure if its because I'm using a digital meter or because there's an issue with the lambda system but I'll look at that more when I've tested the CPR properly.