[Excaliber]

1964 High Rise iron here. Keith Craft testing showed the iron High Rise heads were darn hard to beat for flow, by ANY aftermarket head. Out of the box Edelbrocks AND Shelby alloy heads can't touch 'em without port work.

WITH port work on any of the heads (iron or alloy) the iron High Rise are STILL hard to beat! No mention of the original tunnel ports, which I suspect would be "king of the hill" over ALL takers, modern or old.

Modern alloy heads (Edelbrock and Shelby) are based on the medium riser configuration. Easy to get intake gaskets, manifolds etc. High Riser iron heads will cost a ton and WILL require a matching intake. My 2X4 intake OEM alloy Ford (1964) sells for about $1500, IF you can find one! Not to mention the high rise heads themselves!