How long was the total rest? And what was your base malt? If pilsner malt you might be OK. I almost always to a 20 min. protein rest with pilsner malt. I find it improves head retention and body. I've never pushed it longer than that. If Pale malt, then you are more apt to end up with a beer with less body.
Please do report back on the final results. Many folks interpret too long a protein rest is bad as ANY protein rest is bad, which in some case in clearly not the case.