If you want to get hold of this film...
...it's gonna be difficult. The film HAS been officially released on VHS over the years but has been deleted for a good few years. To my knowledge, there has never been an official DVD release to date but you never know, studios are raiding their back catalogues constantly to find new stuff to put out so it's probably only a matter of time.
I have seen copies of the official VHS for sale in the past but, since I have the movie taped from TV I never bothered to get it. If I had known what I know now... If I come across any more sources (they do turn up occasionally) I will post them here.
Your best bet is to try one of the "video locating" or "video search" services that many online retailers provide. They could turn it up.
Incidentally, I've been lucky enough to see the '34 in the flesh (metal?) and meet and talk to Pete Chapouris, who built it, along with his business partner Jim Jacobs. I got to sit in the car and have my pic taken with it and them. I've still got a (bit blurry) photo of me as a youngster sitting on the running board of "The Kid" which is a bit of a treasure. The car was as stunning in real life as it is in the film. I've also seen the original '32 Coupe, white T-Bird and black '55 Chevy from American Graffiti, the ZZ Top Eliminator '33 Coupe, Jamie Musselman's AMBR winner '33 Roadster (met Boyd Coddington, too, and sat in the car for photos) and a few other famous Rods'n'Customs so I guess I've been very, very fortunate. Especially when you consider I've never even left the UK... Ah, precious memories!