Iron Ram heads on a 340???

He actually has a set of Harland Sharp LA roller rockers and pushrods he saved from his old car that he plans on using which is why he wants the Iron Rams. He also has new valve springs so all he with needs is the head with stainless valves, some keepers, retainers, seals and head bolts otherwise.

Stock retainers won't work due to the smaller valve stems I believe.

Spot on,with valve spring retainers.Some Mopar 2.2 litre interchangeable,, springs best to work with: Hughes 1110,plug & play.