It does have the power brake booster and the fender tag does show V1W= white vinyl top.

It has a booster? Hard to tell from your photo:

https://i.postimg.cc/vZ0zrdCG/IMG-4173.jpg

https://i.postimg.cc/DwNGfft4/654.jpg

As I explained. Vinyl top is incorrect. Not stock.

What am I missing ?

OK - MUCH better picture. Go back to the top of page 7 to see the correct way a vinyl top was installed at the factory on a 1970 Challenger.

Would have been easier if you had just stated that the vinyl top that is on it was done incorrectly. The way you stated it I got the impression you were saying it shouldn't have a vinyl top. Wrong tires also if we are going that route. Wrong brakes ?

Does anyone reproduce the correct vinyl top with the wide seams? I remember that was the big dilemma back in the day when I was playing with these Mopars.

Year One and Classic Industries

Does anyone know this car ?
https://www.mecum.com/lots/FL0119-36...ge-challenger/

Plum Crazy with White interior
426 CI Hemi engine
4-speed transmission
Award winning build
Numerous appearances in Muscle Car Review magazine
Estimated in over 100 national magazines
Named in the Top Ten Hot Rods in the Hot Rod magazine
Featured in YearOne catalog and Diamond Piston for advertisement
World famous Dave Dudek 1970 Challenger
White vinyl top

Originally a 340 car, built for FAST. If it still has the Dudek FAST spec motor (I'm guessing not) it should be a ball to drive.
https://www.hotrod.com/articles/hrdp...ge-challenger/