To what extent can you change a conference article after review, when implementing reviewer suggestions makes the paper too long?
Within the guidelines set by the conference publication process, I see no reason why you can't make small changes that can reduce the page size. I will often edit things down for the final version to fit in the desired format. Of course, if your review comments were "everything is too terse, please expand", then you might have a problem with complying with review comments and page limits :)