1993 Merc. convert to 25" shaft

[fdheld34]

I have a 1993 Mercury 135 2.0 20" shaft length.



I am possibly going to have transom enclosed and Hermco bracket installed but will then have to use a 25" motor. My questions---
Is there any kit etc out there that can convert my 20" to a 25" or am I better off trying to sell motor and putting money towards bracket and newer motor


Also, if a kit exists..how difficult would it be for me to convert to 25" shaft??? I have mechanical knowledge , limited tools and time.

How much do these kits cost if they are available???????


Thanks, Fred