On Tue, 21 Oct 2008 09:44:55 -0700 (PDT), Tim
wrote:

I'm not necessarily into speed but more into economical performance.
Of course the Speed would probably be determined on how many people
one stacks on the boat, but I'd like to look over the options. But
seeing this would be on a mild lake or slow river (normal flow 7 mph,
max. flow 12 mph) It might be a neat project.

It is unlikely that 28 hp will get it going on plane which will limit
you to fast displacement speeds, maybe 10 to 12 mph if you are lucky.
You really do not want to be underpowered on a river with 8 to 12 mph
of current.