Benchmark bar none, and since you are in Ill, you still have to ship.
Call Chris at benchmark performance or PM s2k1 on here. he can provide advice on the in's and out's of what you may want to do.
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ANd if the AZ guy is on here that called them last week complaining that their was no way they run a 686 against the big 800's. get over it.
I have seen Chris build these motors and they are