you wont gain any speed but it will take the lean out of the boat..

handling, both high speed and around the docks, will improve.

I disagree with fixall. If c/r drives don't improve speed, then why do all twin engine race boats run them?

c/r drives can work together to lift the boat or hold the boat in place (prop rotation). there are many aspects to consider, but generally speaking the c/r set-up is more efficient at propelling the hull forward because the drives work in conjunction with the hull and the strakes, not against it.
.02
c

I saw a complete Alpha on the Richmond, VA Craigslist last week, in the Boats section.

Give me a call.
Tom Mitchell
Cobe Marine
410-255-9488

Definitely go for the SEI, I run one of their lowers on my outboard, good piece. As for the C/R, I dunno, prolly handle better.

I know of a pair of c/r alfa ones are for a $1100 a piece all redone

if it helps

+1, He may not of known they needed work.

The marine told him the seller knew the drive was shot. Sounds like the guy was just a POS.

One of my favorite places.