Jay Laifman
Donation Time
I just went back and looked at Mike's link. That talks about everything above. Also adds the different speedo. I had mine recalibrated at West Valley Speedo to be exact with the tires and rear end I run.
That's one crazy thing about Sunbeams (probably most Rootes of the period). Rather than change a gear in the transmission to match the speedo, they supplied a different speedo for each configuration, including transmission and rear end. So unless your car is 100% stock, and you are using 1960 ratio tires (pretty unlikely), your speedo is already off. So plan on getting it recalibrated anyway.
That's one crazy thing about Sunbeams (probably most Rootes of the period). Rather than change a gear in the transmission to match the speedo, they supplied a different speedo for each configuration, including transmission and rear end. So unless your car is 100% stock, and you are using 1960 ratio tires (pretty unlikely), your speedo is already off. So plan on getting it recalibrated anyway.