I assume we're talking SB ?
Maybe 20 years ago - maybe more - Indy bought Batten, who was making an aluminum W2 head - mine flowed 320+ CFM on intake side, and IIRC 248 exhaust.
But Batten had a weird valve guide setup, which Indy told me at the time they fixed/updated.
At the time, they had a stock of the Batten guides to service the heads in customers' hands.
I would think there's a good market for a stock-appearing, high-flow SB head.