I've heard that 85-87 isn't unheard of, but the 70mph cruise might be a little far out. Seems like I remember a TS Tiger with 525's that would run in the upper 80's though
I cruise at 60mph at 3900-4000 rpm. Top end so far is 82mph at 5100-5200rpm. This is with 525 efi and 4 blades. So I think it could be accurate. My speeds are with 2 gps.
I could be wrong but I think it sold and is owned by someone over here now.
Unless there is another with the exact paint scheme, I think that is a buddy of mine's here in La. Bought it on the East Coast (Maryland?) a couple months ago. May be a bogus ad.