imo > a FEW ounces wont hurt.. ive done the same thing
but...in MOST engines a lil low is better than TOO much
in an air cooled engine the oil is a coolent also..on my baby thumper i have an add on external oil cooler...remember modified vw bugs had a cooler and a bigger sump and pump...
the proplem with TOO much oil is you are shortining the(jmo) life of seals & gaskets..the real question is how much is TOO much...