I must say, before providing the below info, that none of this is personal and you should not take it that way. This forum is about the car(s), not personalities.
The facts as we know them from decades of research and reference material tell us a lot about what is correct and what is not. There are experts on this forum that have detailed production line dates and times for these cars who may chime in as well.
The tag is a clearly a reproduction. Here are a few of the most obvious problems with the tag.
The VIN is BS23N0E
131758 so the sequence number for your car is
131758.
The LA plant was building E-Bodies before and after
131758 in January and February of 1970. Your car was built in the
first or second week of February 1970 as seen by the tags below which are
before and
after 131758.
View attachment 140621
The
V4X Strobe Stripe was announced via Product Information Bulletin on January 28, 1970 (see page 2 below) and began appearing in February/March 1970 so that is a plus for your car but you need a broadcast sheet, window sticker, or at least some original photos of the car when new to prove it since the fender tag is in question. Options introduced during the model year took some time before the parts were actually available and the word got out to everyone of availability.
If anyone has a real tag with V4X AND an SPD before March of 1970, please post it.
View attachment 140622
It appears your very original looking Door VIN decal is correct and shows
2 - 1970 which matches the sequence number time period. That makes the fender tag's Scheduled Production Date of
C02 (December 1969)
suspicious. It is not reasonable to believe a car was scheduled for December and failed to be built until February.
The
V1X Black Vinyl Top code is replicated a 2nd time on LA-Built E-Bodies as noted earlier in this thread. That is
missing on your tag.
The other Cuda you referenced with R21 as a radio option also has a reproduction tag. Again, a clear repro.
View attachment 140623
The reason they cannot change the car to a different engine is that the 5th digit of the VIN is on the Dash VIN plate as an
N (383) as well as the Door VIN decal and any other factory or state-issued paperwork for the car. The reproduction Dash VINs have font issues so changing the engine code to scam buyers is difficult.
Others can chime in but our hobby keeps other factors that show fender tags are repros (and yours have those red flags as well) under wraps to not aid making better repro tags.