Bear,
My little DS 290 used to go 28 miles an hour at 4000 RPMs with 12:1 years,
But that was with the rev limiter and snap tie trick
Just in case you're interested with her located, rev limiters to the left side of the oil filter, and the strap tie goes back to the back where your transaxle is......
Bear do all of those things and if you're not happy then have your clutch machined......