Hey guys, sorry my first post is a question but i am in a bind and needed some advice quickly. We have been working on my friends boat which has a 1977 90HP Chrysler. The lower unit is shot, seals, and gears and all. Parts are pretty tough to find but we found a great deal on a different boat that may have parts. The other boat has a supposedly 1969 Chrysler 70 hp engine on it that has a good bottom, starts, but wont stay running. It also comes on a two year old trailer and his is screwed so the price is right. What we are looking to find out is if the lower unit, or whole lower and mid from a 1969 70hp would possibly fit his 1977 90hp. They look very similar but thats just from pictures as the boat is currently 2 hours away. Any and all info you could share would be hugely appreciated. Thanks in advance.