From Chrysler Power, January 1995 - Dan Davorak flowed Stock Port "B-1 B/S" Wedge head.
Note: I believe these were flowed at 10" and converted to 28" numbers:

0.100" = 67.74
0.200" = 131.96
0.300" = 183.78
0.400" = 225.53
0.500" = 262.92
0.600" = 278.92
0.700" = 283.72

From Performance for the Chrysler car Enthusiast, Sep/Oct 1993 - Performance Engineering flowed Ported "B-1 B/S" Wedge.
Article says this was a mild porting job?

0.200" = 151.0
0.300" = 209.0
0.400" = 257.5
0.500" = 297.9
0.600" = 315.8
0.650" = 319.0

from ET heads.com, cnc ported (I think max wedge port size.)

Valve Lift Intake Exhaust Valve Lift
.100" 75.8 59.1 .100"
.200" 149.6 108.2 .200"
.300" 217.8 144.8 .300"
.400" 272.6 173.2 .400"
.500" 313.6 198 .500"
.550" 330.6 209.2 .550"
.600" 342.8 219.3 .600"
.650" 350.6 229.5 .650"
.700" 355 238.2 .700"
.750" 354 246.1 .750"
.800" 353.5 253 .800"
.850" 354 260.2 .850"
.900" 352.8 264.7 .900"

Exhaust to Intake Flow Ratio 66%

The heads have nice small closed chamber design 65cc, and sparkplugs moved closer to center of chamber. zero deck Flat top pistons in a 451 makes about 13:1 compression ratio.

My 451 used dished pistons to get 11:1 cr, and I only needed about 32-33 total ignition timing.