1987 60 hp Evinrude vs 1984 70 hp Johnson

[Force 120]

Hello,
I am going to pick up 1987 60 hp with power tilt that has one bad piston (3 cylinders). I want to move the power head of my 1984 70 hp Johnson (non power tilt) to it. The block looks like the same. Please advice if any issues I may have.
Curious to know if the block the same what make 10 hp different?

 

[racerone]

One motor is rated at the powerhead and one is rated at the prop !

 

[ct1762@gmail.com]

might as well put chris carson reeds in it while your at it

 

[Force 120]

So both of the powerheads are the same design or share most of common parts.
How about the carb? Could It be the same carb?

 

[juno pierrat]

not same carbs, slightly different styles, i like the 87's. i like chris carson reeds with stuffers,

 

[Force 120]

So I think I should rebuild 60 hp power head and replace 70 hp on the boat. Do I expect to lose the speed?

 

[racerone]

The powerheads are the same HP !!-----One is rated 60 HP at the prop.-----Well it might be 62 .5 but they have to pick a nice number for marketing.