904 or 727 ?

a 904 is .15 quicker and about 2 mph faster,,,,,as I removed a 727 and replaced it with a 904 in a 11 flat car back in 1992....the 727 actually had a better converter then the 904 did at the time...

the 904 is about 35 lbs lighter then a 727 and most of that is internal rotating parts...

a 904 will not bolt up to a 383 without some kind of adapter....