I second tossing the chips in favor of cubes. I would also look into using staves or spirals. With all of those (except chips) you'll get more depth of oak flavor to the brew. It will also not change on you as it will with chips (at least IME).
I also have a big wee heavy on deck (need to check my inventory, but think I'll need more grain before I can brew it). I plan on aging mine on 3oz of medium toast oak cubes for at least a couple of months. I'll pull a taste sample after a month, and then every month after that to decide when it's time to get off the oak. Since I'll be kegging this batch, I might put some oak cubes into the kegs for even more contribution. I also have a couple of spirals that I could use... I have plenty of time to decide, since it's probably going to be on the yeast cake for a couple of months, before it gets put onto oak.