The numbers off that Shocker link look about were they should be with that runner size. I'm kinda surprised that's all they flow with a 2.08 valve. I've hit 318 cfm on Eldelbrock heads with a 2.08 valve. Stock Eldelbrock heads max out at 243 average on my bench (out of the box)
Shockers (Promax cnc)
Flow Data @ 28″ water
lift 200 300 400 500 600 700
Int 142 202 251 278 284 286
Ext 124 159 190 203 219 231
