1050 dom now but will be trying a bigger one soon
You might be just a TOUCH low on cfm....my 405ci at 8200 rpm
needed 1045 cfm...you said you shifted at 8800 so maybe a
1150 might be more in line... or a tunnel ram with a pair of
slightly smaller carbs.. I sold my W-9 engine but my next step
was gonna be a new cam and 2 1050s... I ran out of cam on my
engine... thats why that cam you have would have helped my
engine a good amount... without running it through my header
program I would only guess you needed about 1080 cfm or 1100
EDIT
my engine made peak torque at 6000 rpm and I ran a
5600 stall and it didnt fall back below 6000.... also
I left the line right up on the conv(5600 rpm) no chip
and it normally dropped to 6600-6800 rpm.... I was gonna
have the conv re done to 6200 stall but didnt.. best on
my junk was a 1.19 60' and 8.95 at 152.. but the 60' was
normal until the side walls would start going away.. if
it got down to 1.23 I got new slicks