If you think it will be fun, do it. Changing things up to have more fun (= more motivation = greater effort = more PRs) is never wrong in my book. I dont think it will hurt to work up to a heavy 2 or 3 and then lower weight and do 8s, ive been training that way myself off and on and its fun and challangeing. Be prepare to lower your rep-work weight some in the beginning though, and look for indicators that show a lack of progress.
Have fun, kill it.