The early style Merc 330's came with 2-bolt mains. Then around the late 1980's or so Merc started using the 4-bolt blocks in the 330, but I think they still used cast cranks, pistons and the 3/8" bolt rods.

I have a complete Mark IV 330 that I bought for $1500. It has 300 hours on it and is together and ready to run. I plan on putting in my Baja this winter so I can keep my custom engine for a different boat. I would say if it is a 4-bolt block it is worth around $300 to $400.

Jeez, I'm glad they didn't make 6-bolt blocks,,,,,,,,,

Convincor, I would be interested in purchasing what you have my Gen IV Is tired and my winter project is to build another . I could pick it up as is.

Big Dawg
Are you interested in the whole engine?

Yes the whole engine what ever you have.
Carb to pan as you described it.

Convincor,
Where are you buying a brand new GM 502HO Marine engine for $4300?
Russ

Offshore Performance Specialties
239.489.0884
This was early spring of 2003.
They are advertizeing now in Power Boat Mag. for $4895.

Thanks for the reply.

Convincor do you want to part with that thing or what?