"rod, does yours have the extreme outter strake (bottom, outside, rear edge) like this one?"
No it does not.
I have figured out that in 1976 the bottom of the Bonneville was changed, mine is a 1975. This 1982 bottom looks a little different than the 1976 as well. 
I think the version like mine was only offered for two years. This is the second uncapped Rogers I've seen.
Your figuring is way off. Roger did not change the bottom of the Bonneville, he created the 19TR bonneville, the one pictured in this thread...which is one of my boats that I rigged back in the day, (nice to see something I had a hand in building being so well cared for
)the Bonneville was never out of production. All the bonne bottoms are the same from the early 70's til.........
In order...
The Rogers Cyclone. goads hull.
The Super Cyclone, which had the new, improved 18 bottom, flat deck. Remains unchanged to this day.
18 Bonneville, the super Cyclone bottom with the new bubble deck. Remains unchanged to this day, Advantage owned/owns the molds and bought them around '84 if memory serves.
19TR Bonneville, the boat in this thread. the 18 super cyclone/Bonneville bottom stretched a foot or so, dropped chines added.
20TR bonneville, 19TR strecthed, different deck tooled up.
There's also a cruiser from the 70s in the mix that I've only seen one of and then the 21 cruiser that came in the 80's. Rogers still has one of these for his own boat.
Here's an ad that will clear up a few things for ya...
