for a '46? there are lots of good electronic speedos available, but doubt there's many that could be adapted to your dash panel, so you might consider one that could be mounted to the steering column .... but you might also get an adapter to convert the trans signal to mechanical for your existing speedo, number of them available

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics