Quote:
I just threw one on my bench and it said 820cfm


You don't know what the test pressure is?

Edit:
Okay, I looked at the site where you got your electronics from.
The picture of the display box isn't all that clear.

Is one of the options for the display 20.4"?
If not, are you using one of the other depressions and converting the numbers to 20.4"?

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads