If it was the Hasegawa Caddy, it is a KIT, Not a Promo.
Only Jo-Han did the 66 Caddy Coupe De Ville Promo.
Hasegawa offered 5 US 66 Cars in kit form.
Cadillac Coupe De Ville, Thunderbird hardtop, Buick Wildcat, Pontiac Bonneville and Chevrolet Impala
(Actually, from what I have seen, the Chevy is a 65) All are Curbside.
The Dash is not accurate. it has a "T" profile with more curvature on the top that the face which is Flat.
The detail is a decal!!
Interior upholstery is identical in most kits with the only differences being the rear sear area due to roof line.
Chassis is also shared between all 5 kits. Hubcaps/rims are shared in most too.
The tires are nice BF Goodrich narrows with separate white-wall inserts
I have 3 of the kits. Wildcat, De Ville & T-Bird.
Those JoHan custom parts make it look good. I used them for the prostreet hearse build, and now I'm using them on the stretched prostreet hearse. Are you gonna use the interior parts in this, or keep it stock? I'll be watching! 
Thanx for that info, Like I said I have no clue, I didnt kno Jo-Han did a promo too, it was like the firstpic, when I got it, and no inerior, but! I got one that will fit it, kewl info tho.
Nah I wont be doing the interior stock, just some mild kustom stuff tho, like working the dash into a kustom center console. might go with 4 buckets, front swivels, I dont have the chrome pieces for the grill, sooooooo, we're gonna see what my lil mind can come up with, to fix tha issue, just might make my own from pictures I have, even going to play with the frame, I got alot of them, I know I can get something going there.
Thanx guys, build on.....