20 HP to a 25 HP

[chrystler66]

I have a 20 HP 66 Chrysler and it pushes a 15.5 foot Monark with a casting deck about 15 MPH, would a 1976 25 Johnson push it much fast or raise the nose up a bit more?

 

[mnobfan]

Should go faster and parts are much easier to come by.