Missed on this combo?

If Indy flowed theirs in Indianapolis and you in Washington state, then I'd say those numbers are spot on. At What elevation do you think edelbrock's flow bench sits? I'd guess 1000 -1500 ft is worth 10 percent.
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Thought I'd share my CNC head experience. These are my IndyBrocks CNC'd by Indy, as we can see the advertised flow #s didn't exactly measure up. After recutting the valve seats and adding a good valve the numbers were much better. Don't give up on the heads yet.

Thats suppose to be 248 at .400 on the far right column