The 109" looks great. I'm working on a 66 109" now. Judging by your interior seat base color, it appears that marine blue was not the original color. Also, it looks like someone has put on the shorter Series 3 style sill panels (probably due to the unavailability of the longer Series IIA type).

70-75mph is excellent for a Rover! I'm changing my motor so I can cruise at that speed. What type of Diesel does it have?