727 vs 904
The 383 two barrel trans only has 3 frictions in the direct clutch; just like small block 727s; that's the weak point. All other bb trans had four direct frictions except the hemi; which had five. I build 727s with six direct frictions for over 1,000 horse all the time; and 904s with five (which is what it takes to handle 500 horse); red eagles of course.