Naw on the Etec, you gotta get one of these 557 hp monsters. seven-marine.com
Heck any "outboard" with a transmission NOT in the lower unit and can swing an 18" prop is what ya have to have for the 27. Shoot, I'm thinking way into the 50 mph range with one of these. Don't worry about the initial cost, it's only money.
2012 technology on a 1967 SeaCraft....that's cool.