Anybody running "Thumper" heads?
 

Is(has) anyone running "Thumper" heads? I'm thinking about buying a set to add to my engine combo I'm building.
They claim to out flow the GT-40 series heads.(219cfm and 158cfm).
I can get a set for about $700 which includes shipping?
They are ported and polished E7 heads complete with 5 angle valve job,valves,springs etc..
I want to keep the Comp 292 cam so I decided I would just build around the cam and not the heads I have now.
I figured with the Thumper heads, I would be running solid 12's
What do you guys think?