Old Stage VI head ID

A friend has these assembled Stage VI aluminum heads with MW ports. That family of heads was rather hit and miss but neither of us can find any info on this particular casting.
They seem to be as-cast.
He picked them up from a club member who was trying to liquidate stuff before he passed. Any info about them died with him.

Do any of you know about this casting?

theres a symbol in the casting by the springs, thats the one that is the decider.

I am not sure but weren't they cast by Winters and Zeus foundries? Should be in the Moparts tech archives Kevin...

http://www.moparts.org/Tech/Archive/bb/33.html

Non-Chapman Stage 6 MW heads come in two flavors......
Straight plugs with a heart shaped chamber(the traditional stage 6 configuration), or angle plugs with a more peanut shaped chamber.

If they are MW as cast, they would use std BB exhaust rockers, and intake rockers that have a .485” offset.

Either version can have any of the usual known stage 6 issues........ so check them over carefully before using them.

The Zeus castings are the better heads.