Magnum head casting number?

[dusterglenn]

Anyone ever see a magnum head with a casting like this? There's also no core plugs on the ends of the heads.

 

[toolmanmike]

Not a stocker that's for sure.

 

[dusterglenn]

More pics

 

[dusterglenn]

More pics, second try...

 

[itate]

From what I can find they are made by Pro Top Line and sold through RHS (racingheadservice.com) and have been discontinued for a few years now.

 

[Abodybomber]

Aftermarket for sure. Magnum casting number is generally 6671. I have EQ castings on mine,no markings like that. Sounds ,like the RHS/Indy to me.

 

[dusterglenn]

All the pictures of the RHS heads that I found online had their logo cast by the spark plug holes. As well as dual exhaust bolt patterns.
Can anybody take some pics of their Pro TopLine, RHS, or EQ heads for comparison? I haven't found much on google. Not with much detail anyway.

 

[dusterglenn]

Damn, I was hoping somebody here could help me ID this head.