The most likely problem you would encounter if you use an HF coil form for a 455kHz
inductor is that you can't fit enough turns on it.
455kHz transformers (as well as the LO coil from an AM BC set) generally use ferrite cup
cores to get sufficient inductance. HF cores (such as those used in 10.7 MHz IF stages)
often use powdered iron instead.
The 10.7 MHz transformers are often used on 80m and 40m by adding capacitance
across the tuned windings. The 455kHz ones are often used on 80m by disassembling
them and rewinding them with fewer turns. One receiver kit I have uses 20 turns on
a low frequency core for the VFO, though I don't remember whether it is operating
around 3 or 4 MHz. (Many of the 455kHz coils are relatively easy to rewind, depending
on the mechanical construction.)
I have a lot of coils in my junkbox, and haven't found much standardization of
core colors. Often the 455kHz transformer sets have color coded cores to
identify what stage they are designed for rather than the frequency range.
You used to be able to order coils from Amidon with slugs of a specific color
that matched their toroids, so you knew more about the material used, but
I haven't seen that in any other commercial coils. When in doubt, you have
to read the data sheets carefully and hope they have the information you
I've run into a couple quirks using the ferrite material (from 455kHz IF coils) on
80m. First, one receiver would drift out of band when left in the hot sun. I suspect
this was more due to the varactor shifting with temperature, but I don't think
that the ferrite is as stable with temperature as the high frequency slugs are.
The second quirk, seen in hand-held 80m DF receivers, was a slight frequency shift
as the receiver was rotated. This appears to be due to the Earth's magnetic field
affecting the inductance, and was resolved by reorienting the coil so the axis was
vertical in normal operation.
Here's an article on rewinding such coils, showing the two types:http://www.intio.or.jp/jf10zl/ozlcoil.htm
though I'd say his "type A" coils are typical of 455kHz transformers and "type B"
of 10.7 MHz IF transformers.