You need to find out if you need a 80 or 110 degree wiper assembly
make sure your selection has a self parking feature if your present one does
or it will bug the heck out of you ...
Its not that bad of an installation , the hardest part is drilling some more holes in your boat ...

heres a few links for you to check out ... Barney
http://www.amequipment.com/03_marine.html
http://www.seattlemarine.net/product...idCategory=945