By-entry text formatting?

Is it possible right now to enable/disable text formatting by entry? I have a number of weblogs I’m moving from Movable Type to WordPress and most of the entries are imported fine, some of them end up mangled with extra
and tags.

Most of the time I van live with the changes, but once every so often I have a <style> block in an entry, and that is completely destroyed by WordPress–things like this:

<style>
#grrr {
border: 3px solid #000;
display: block;
width: 250px;
height: 376px;
background-image:url('https://static.flickr.com/33/57039271_05fd105113.jpg');
margin: 0 auto;
}
#grrr:hover {
background-position: -250px;
}
</style>
<p><a id="grrr" href=”https://static.flickr.com/33/57039271_05fd105113_o.jpg”&gt;`