Dual plane manifold for the chi 218cc heads on a 400 cleveland

Ive just got a pair of manifold spacers made to match a dual plane edelbrock manifold up to the chi 218cc heads
Ive been in contact with Bill and Mary from Price motorsport they have all the mesurments now for the chi head intake surface and cnc program
These were prevousley not avalable the dual plane adaption makes for a exelent street engine with good drive abillity