Hi,
just did what your thinking of doing, I had 882's on my 327 the car ran fine nothing fantastic, I just put a set of steel pro toplines on with 64cc chambers compared to the 882 which I think were 76 either way there a big bowl, and I put a cam and roller rockers, and wow what a difference from not bad to holly shit sit down and grab onto something, my recommendation go aftermarket heads.
Steve