This auction from Partsattic features a project Chevy vintage big block head. 
The 3946074 heads were used on the following applications: 1969 ZL-1 427/430HP All Aluminum engine, 1969 2nd design L-88 427/430HP engine, and the 1971 Corvette LS6 454/425HP engine. Rebuildable head. Rare unit. 2 available
Many more pictures available upon request. 
Please email Rick through eBay for any questions. . 
Many more complete Chevy, Ford, Mopar and other vintage parts, both NOS and OEM parts available.  
Additionally, you can visit our collector motors site on eBay .  
Appointments available for viewing at our offices located in Houston,Tx.
We will crate & ship domestically.