Modify a dropbox - affect records in the view

Modify a dropbox - affect records in the view

Hi,
I need modify a dropobox field that have 7000 choice option, because IE have no condition to run the form. I have 2700 records in the view that it´s related with this form. If I change the dropbox with a ISingle Line Field. My fear it´s about this modification, if affect the record in the view. If I cancel the choices in the dropobox field, are they saved in the view for the data inserted until this moment?
Exist an alternative to use a large option choice in a form with Internet Explorer (Firefox have no problem).
Thanks

Mic