I am looking to rebuild a 2005 Volvo Penta 8.1L GI engine. Does anyone know where I can get a rebuild kit with with all the necessary parts and gaskets?

Any tips or suggestions?

talk to a machine/engine shop..until it's apart and checked out you do not know what you are going to need..pistons.std, +.o30, +.060, bearings, std .010 etc...no off the shelf kits without knowing what you need...

all you need is new head gaskets everything else is reusable .why would an 05 need rebiult if your oil pressures still good an compressions 170 or better you may just need a valve job or if you want more power you can get a set of my cncd heads I have done compression test on new 8.1 s and they rainged 160 psi 170psi

I'm rebuilding it because it is seized. Its been sitting around for 3 years but was put away running.

Already tried all the tricks in the book to get it to break free.

and not to mention 8.1's seem to love to eat pistons !