I don’t have any first hand knowledge about these heads or know anyone that has installed one. They are new builds, and the $7,500 price includes the push rods, head gasket, ARP stud kit, intake manifold fabricated for 2 Ford three-bolt carbs (Stromberg Pattern) and an adapter for an early Ford V8 water pump.
http://riley4port.com/parts/
I have an original Apr 1934 4-Port, that was machined well, bolt pattern true, the only problem was the intake flange that mounted to the head was “warped”, but was milled true with no problem.