It appears its possible to change your vote. Though not stated in the poll, it is clear from the poll and the comments that almost 80% of respondents prefer some type of V8 over the Hurricane. That's big, but mostly tells us owners what we already knew.
If Stellantis is listening and will come out quickly with a V8, it seems that they could do a hemi pretty soon. While other V8s might be preferred, that might take longer.
For the survival of Ram, it seems they need to act now, if V8 plans aren't already underway.