Front pinion bearing fit

Okay, new question. If I want to heat up the new front bearing to make it a little easier to install, how high can I take it in an oven? I have a little toaster oven instead of my mom's big main over, but about the lowest it will go is maybe in the 200 range. I can always try to pull it out before it gets too hot, but I figured I'd just toss it in when I started working on other stuff and take it out when I was ready for the final setup. Then, if the preload is off it might not be so hard to try to get it back off since it will still be a little toasty. Come to think of it though, will the heat throw off the preload reading significantly?