Guess it's working for you well enough but from what I've read on various forums using a dual plane intake creates distribution issues. Not sure exactly how to ascertain something like that is actually happening unless you had 8 individual 02 sensors... Did you remove the center divider? Are you using a spacer?
I ask because I have a low deck Performer RPM on hand but I'm not sure it's worth cutting up just to work with the Sniper. Looking into a Holley Street Dominator as well which is a low-rise single plane.
