On a 1926, wood spokes, turned speedster, is the originial steer (rebuilt) still a safe, stable steering at speeds of 50-60 mph? On asphalt.
It's still a model T and probably just as safe as it was at 25MPH.
Only, if you have 4 point shoulder harness and a roll cage! Or maybe you have more guts than me. For that kind of sustained speed, I'd replace the T steering with a 40's era Ford steering gear box, or maybe something even newer.