http://www.mbellc.com/index.php/content/view/28/1/

Here are some new heads from MBE. Check out the flow rates on these: 470 for the SB and 555 for the BB head.

 

What do you expect. They're Chief heads. Those Little Chief heads will only fit on a Little Chief block. The also need MBE or Jesel rockers.

Big Chief heads have been around for a while and also need a special valve train. Not sure about the SBC but the BBC heads also use different intake and exhaust manifolds because of the port configuration.

Chief heads are all out, high end, drag racing parts.

 

I know they have to use a Chief block. But they have an 11* head that does not say anything about needing a Chief block.

 

Right at the bottom of the page

"Requires Little Chief Block (MBE can furnish blocks in aluminum or iron)"

No specs on the Comp Eliminator legal SBC head