MFG, thank you for your input. Looks like there are two different ways of doing it, rocker shaft removed with one type of tool and the other with the shaft left on with another type of tool.
The reason I asked is I am looking at changing the valve stem seals in the car. Has anyone done this and do you have any suggestions for doing it? Thank you.
I have run into this issue, I wonder where the Vendors get theirs, the mark up is horrible. I was looking into getting a proportion valve and figuring it out. The large valves are all over the place.
Thank you Kodjo, I am looking at making one myself also, thanks for pictures. Nostalgic has an article in their tech articles about the installation of these.
The 630 I got is supposed to be for early Avanti's, it is too small side to side 3 1/2" vs factory 4 1/2". It looks like I would have to make a custom bezel to make it work.