On a 65/66 Solex carb'd motor, I have read in my research that the left side camshaft nut is different that the post Solex motors. Is this true, and is the 46mm p203 crowfoot wrench the proper tool to remove that left side camshaft nut? I have the crowfoot wrench and it doesn't seem to fit that nut very well, especially considering the torque involved.

Thanks in advance for any help, pointers, and/or advice you may have for removing this cam nut.

Josh