Searching for a set of good heads for my Mark IV block 454 cyclone 400 engine. Loaded with comp cams gold rockers would be great but a working set of empty castings would still help me out a ton.

Thanks

Not sure its a special casting. Ive just been reading that Mark V and Mark VI heads have a different water passage then the Mark IV's so they can't be interchanged. I will try and give you a shout later today and see if we cant work something out. I appreciate it

They can by using special gaskets but don't remember if its Mark IV will work on Gen 5 and 6 or the other way around.
I have the holy grail (if you have oval port intake, Big Block Chevy Heads, Large Oval Ports 353049 - 1970-73 - 402/454 - 2.06 1.72 - Open 113cc

I am looking for what I'm learning is the Holy Grail of heads. I need large oval port heads and I see your in MD like me I'm in southern AA county.

They are complete with rockers, springs and valves and valve covers if needed. Come on up to Pasadena and bring a check for 300 and you can take them home with you.