[William Miller]

If you changed it out you would lose the advantages of a closed loop system. I'm assuming that there are some drivability advantages and others besides emissions.

I recall you mentioning that it was on your list at one time. I was recently thinking that there would be a lot of things to match up. You would really need to almost replace (Backdate) the whole CIS system.
If you are going that far you might as well spend the money on carburators.

I think mine will eventually get sorted out. It runs very good when the A/F meter is telling me that I'm between 13-16:1. The problem is that that is not all the time like it should be.

I figure that somebody knows how to get these parts to match up to their optimimum. If I keep asking I'm bound to find someone who does.
I bet there is just one or 2 parts inside the FD that need to be swopped to get the correct curve. Possibly it's just the plunger.

I bought the 79 FD and control pressure regulator last winter. I was swopping the 83US distributer and WUR. I couldn't find any info at the time about an 83Euro Distributer so it looked like the 79 was the closest because the system works the same way they do however have different part numbers. My little spec book shows that the control pressure on the Euro Control pressure regulator is just 1-2psi (lower I think) on the warm control pressure. I've never seen any info on FD's.