…as the Italeri. If it isn’t? Is it a decent kit?
Depends on the kit. Early Heller ones were Italeri reboxes. Later on, Heller did their own with some updates/modifications. I think they still used/copied mostly Italeri parts for their new one though.
I think the decals in the Heller kit are more accurate for a USAF UH-1N
The 20th SOS carried both types of markings, depends on the time period, found pictures of both styles in one of the Squadron books