I am new here with my first Mopar and try to get some Information about the history.
There is no broadcast sheet, no contact to the previous owner or anything. Just the car sitting here with unknown history.

What I know about the history:
As far as I know from the title the preowner (Randy R. from Huntington Beach - now located in Idaho, CA) bought it January 2017 from Marietta Tomchik - Sports Car Gallery of Beaver Falls, Inc, PA.
Unfortunately the company is closed permanently and the e-mail account is not active anymore.
The preowner said that he bought the car back in 2006 (thats an inconsistency with the title) and put money in it.
It seems that it has been a bigger project at some point.
The car has been repainted with the original color about years ago.
The interior has been renewed about 10 years ago.
The Preowner added a Go-Wing.
I figured out that the car might have had a minor collision between passender door and passender front Fender, that has been repaired.

About the car itself - some tag numbers:
1970 Challenger R/T
>>JS23 NOB 281255<<
E63: 383 cid 4 barrel V8 H.P. 335hp - still in the car
D13: 3 Speed Manual Transmission-Floor Shift - now 4-spd
EK2: Go Mango Exterior Color - repainted once
HRX9: Trim - High, Leather Bucket Seats, Black
EK2: Go Mango Top Color
A63: 70 only Challenger Moulding Group
G36: OS Dual Racing Mirrors
J45: Hood Tie Down Pins
V68: Longitudinal Stripes, Deleted - preowner added them.

There was a guy trying to sell a broadcast sheet for this car on Ebay last year, here is a screen capture I saved;

Here is a link to the sellers Ebay store:

https://www.ebay.com/str/Larry-s-American-Classic-Parts?_trksid=p2047675.l2563

I would reach out to him to see if he still has the BC sheet. Good luck!

Thank you very much for that hint!
One hour after i posted my thread here i spotted that add through pure luck!
I wrote the seller and he was really surprised.
He was offering that sheet for almost two years now and a few month ago it was trashed by the cleaners!
That hurts so much!
But to be positive - a member from another forum send me a downloaded picture of the original auction and now i have all the data from my original build sheet.
Thats at least the second best thing that could happen.

And I was told that my factory seats are installed in a green Charger now that was sold to Europe. Maybe i can track it - chances are good that its in Germany now.