Is anyone using a 904 behind a GIII Hemi?

I'm sure you probably know this but, 727 & 904 gearing is the same (2.45 1st, 1.45 2nd) to 1980. In 1981, 904s got 2.74 1st & 1.54 2nds - if that makes a difference in what you have/want. Just some food for thought.