I just recently purchased a 1993 wellcraft excel 20 sx, Volvo 4.3. I am trying to figure out which outdrive i have. Decal says SP CD Trim. From the posts I've read i believe it to be 290. I think its a 1991. Motor is 430b 205 HP. I'm new to boating and need to order a few parts and want to make sure I'm ordering parts for the right drive. Also any recommendation for online manuals for motor and drive. Thanks in advance for assistance.