Been lurking for a while watching your 21 come together. Although not a SeaCraft, I have a 20 foot Bertram project going through the same restoration.
Where did you end up picking up the 383 stroker?
I have been watching
www.marinepowerservice.com and Doug Russel but have not seen any price movement.
I would be interested in hearing where you purchased the pwer package from.
Best of luck!
Ian Upton