trophy2860
Recruit
- Joined
- Aug 17, 2013
- Messages
- 2
I have a 1986 Trophy with a single prop 290 outdrive. Is it possible to install a dp lower unit only (assuming the same gear ratio) on this outdrive? Thanks for any help.
Yes you can. The 280-290 dp lower will bolt on. You will have to re-shim the lower/intermidiate housing bearing race when doing so. The dp has different ratios according to your engine... 2.3:1 for V6's, 1.98:1 for Small Block V8's, and 1:78:1 for Big Block V8's.