I am thinking of building a 650 hp hemi for my 67 Coronet drag car. Thinking of around a 4K stall and foot brake launches. I have a 742 case 8 3/4 with MW spool 3.91 gears and 35 spline axles and 1350 joint in the car now with cal-tracs. Do you think this rear could handle the hemi?
I know put a dana in and forget-about it, but since my 8 3/4 is already in there thought I ask for opinions.

Thanks.