I wish I had the time to put everything on computer! Actually, I wish we'd had the technology back in the 70's and 80's...
I knew there had been several cases of all seven team-members winning a race, but I am sure there must be one or two cases of 10 (maybe 11) different race winners from 13. Obviously, the main thing is to look at a good team, solid from 1 to 7, and riding away from home. My first thought was Poole in 1969, but no luck there...
I don't have all the figures, but I wonder if a Cradley team from the early 80's would be a good place to look.
I should be able to a little more of my own research now, as I have finally got all my Speedway Stars that were in storage 400 miles away...