Yeah, a good condition promo would be hard for me to avoid improving because I like detailing. Part of the charm of promos is most times the interior isn't even painted. I see the '64 Impala quite often, usually convertible and with broken windscreen frame, and I know the interior tub of the 1989 AMT release of that car has the promo tub unchanged, I think the whole kit is a light mod from the promo cos you can see the casting marks and where they changed parts of the chassis for the mainstream release.