Decision to make between motor options

[59seaskiff]

I have a completely refurbished 1957 Johnson 35HP Big Twin motor that runs great but has no wiring harness and must be converted to electric start. I have had problems finding anything needed but the flywheel, which I have obtained. The wiring harness and the starter motor have eluded me. Today, I found a great deal on an electric start 1966 Johnson 40HP Super Seahorse that runs/looks great and has a wiring harness included for $500.
$64,000 question: All things considered, should I buy the 40 horse newer motor and sell the big twin, or continue to search for those elusive parts?

Any advice would be appreciated...

 

[racerone]

Worked on many of those 66 model 40 hp motors.--------If it is properly maintained and it good condition it is the better motor of the 2 models.

 

[rolmops]

You can build your own wiring harness for the 57. They are very simple. Starters are available all over the place at about $100 dollars a pop, add to that the starter solenoid and starter button and overall it should come up to (give or take)$150.But you can probably sell the '57 for about $350. In the end it all boils down to the individual condition of the engines and your personal preference.