That seems like a lot of oak. I did a similar recipe with 1 oz of medium toast chips. The oak flavor and aroma was quite strong when I racked to the keg after 6 months but I suspect it will mellow over time.
Beer, if drank with moderation, softens the temper, cheers the spirit, and promotes health.
"Give me a woman who truly loves beer and I will conquer the world." - Kaiser Wilhelm
"I would kill everyone in this room for a drop of sweet beer."- Homer Simpson