I was considering purchasing a 1975 Bayliner I saw online but it says it needs outdrive repair. The owner says it has a 305 GM outdrive with a volvo penta. I know nothing about boats but am somewhat mechanically inclined so I figured with some repair manuals, the internet, and lots of time I could work on it. So what kind of project am I getting in to and what cost would I be looking at assuming I try to repair myself?