Re: 1959 35 hp evinrude longshaft to shortshaft
You don't have any options here sorry. Nothing will work, using the '57 drive shaft or direct bolt up.
In '58, the RDS went to a Super Quiet gearcase and dual line water pump, the secondary line recirculating via the thermostat. The '57 did not have a thermostat, nor the dual line water pump setup. All '59s were the dual line, with thermostats, so none of them will work as a bolt up. The '59 also has a different drive shaft altogether, and different impeller, so cannot simply swap drive shafts and pull out the extensions. Sorry.