render ambient occlusion only on certain parts.

I'm making a resource pack that backports the modern torch to 1.20.1 and some mods. In order to add the torch model onto existing blocks, I need to turn off ambient occlusion for the model, but this can cause some models to look bad. so I need to know: Is It possible to mix models with and without ambient occlusion? preferably, I'd like to do this without vanilla shaders due to them being experimental (and being terrified to learn them). I've thought maybe multiparts could work but It seems like they just Inherit the state from the first model In the list.