On Wed, 13 Jun 2007 23:56:31 GMT, Duke Nukem wrote:

How old the is technology on the GM 6-71?

Dunno. What's a GM 6-71?

aka DD 6-71, a pair of them heading north next week, coming soon to a
harbor near you.

They were designed late 30s, early 40s. First application was to
power Sherman tanks in WW2, followed by a kazillion busses, heavy
construction equipment and commercial generators, followed later by a
few fine motor yachts, lobster boats and trawlers.