power trim removal

[Bracker]

Have a 1981 90HP that I just got a new powertrim tilt piston from Boat.net.
Need to know procedure to remove old and install new unit. Looks fairly easy but thats always the kiss of death.

[boats.net]

Pretty straight forward, just remove the upper and lower pins (and the hydraulic lines). Removing the pins maybe difficult depending on their condition.