727 vs 904

There is huge debate on this and Stock/Super Stock racers with big blocks pay big dollars ($5,000) for a fully rollerized, and torrington bearinged 727 with 904 guts in it from Pro Trans in California. Is it worth it? Best answer I could get was between 0.18 and 0.25 seconds in ET. If you are a class racer looking for every thousandth to set a record, well, then maybe. If you aren't I don't see the point. If you have a 904 keep it, mine has held up to much abuse and it is lighter, which I like. But if you already have a 727 I doubt you'd see any marked difference in ET.