I have a 2005 23' 5000lb Monterrey, I have recently replaced the original 305 MPI Alpha 1 Gen 2 with a 383 MPI and a Bravo 1.
The 305 prop was a 4 blade Solas 14/1/8 x 19. The Bravo drive i installed already had a Mirage 3 Blade 14 3/4 x 21 on it, it was hooked up to a 496 in its previous life...