I would need to know your chassis number in order to POSSIBLY tell you more detail. If you could post or e-mail more pics I could also help identify more things...
There is certainly some misinformation in your paperwork. What I can tell you from the single photo:
Yes, it is a Beck and it would have come from our Brazilian production years.
It is likely pre-2000 as we stopped using those turn signals and taillights in the late 1990s. It's also a 4 lug long axle car which is much more common pre-2000.
Keep in and that we sold a lot of kits and rollers, so I can't tell you if it was factory assembled or a kit, but at the time (assuming it was factory built) we offered 2 engine sizes, a 1915cc and a 2165cc. That said, I see 2 common things: 1) a client could request ANY engine size they wanted and/or supply their own, so the engine size is really anyone's guess without cc'ing it or without paperwork. 2) EVERYONE says they think it has the larger motor simply because these are light and still pretty darn quick with only 120hp. The most common comment I hear regarding engine size relates to "its so fast it has to the the big motor".
Looks like the interior was redone. Red leather got red carpet 99% of the time in the Brazil days. Seats were also a different style intros days but I can't see enough of them to be sure.
The few accessories that I can see would have been added later. The bonnet straps are more outboard than our factory location and the Wendler badges are non-patina and slightly lower than what we do... nothing wrong with them but I can just tell they weren't done at the factory is all.
Used cars get drop shipped back here all the time for service and updates, so it is possible it came back here at some point, but again I'd need a chassis number to be able to check any of that out further.