the last year jemco made them was 81. a few were made in norcal later than that. this is most likely a texas splash, as it's in okla. i saw a few of them in marble falls last august - nice boats, with some interesting twists, although this one looks close to original design from the top at least.
personally, i would not run this one without the tunnel plates, but that's just me.
The Dash, is the give-away on the Texas, Bellco Southwind tunnels, the bottom off the dash, is pulled out about an inch or so,right in the center.
you can kind of see it on the blue boat
Sleek
http://www.hotboatpics.com/pics/data...63100_0579.JPG