If it was me I would go with the 572-13 heads.I have found its best to go ahead and get the best you can at the start,because even if the 440-1 heads do what you want at the start you will soon be wishing you had gone with the 572-13 heads.I have never wish I had built a small engine.With the 572-13 heads you will also have enough heads to go with more cu in later if you should chose to do so.
I have been very Happy with my 572-13 heads,never once have wish I had gone with the 440-1's.