These OEM 2.8 RSR twin-plug factory racing heads https://pbase.com/9146gt/image/150780641 were removed from a Ralph Meaney race engine. Note how the injector ports were plugged https://pbase.com/image/150780651 so that these heads could be used with carburation, 46mm WEBER. The RSR heads are most often found under high-butterfly injection. With either induction, these heads flow a lot of air through them with very large intake/exhaust ports and valves.

Two of the heads have broken cooling-fins https://pbase.com/9146gt/image/150780657 and those areas https://pbase.com/9146gt/image/150783408 will be expertly repaired to look as goos as new.