WOW, that is a nice looking manifold. Beautiful casting work. Can't tell from the photos if it has the connection to the exhaust manifold like the stock intake does.

That sucks that they left behind the tooling. I guess it got melted down or something, eh?

Yeah it's a bolt on replacement for stock intake so it has the holes matched to bolt over stock ex manifold. I guess that tooling got melted

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

When you find such a manifold, get someone to copy them.

Rust collector's got a great idea. When you find the wealth, make provisions to share it!

Were these aluminum or iron?

yeah, I'm busting my ass. I even have a friendly foundry, that makes state of the art reproduction of this kinda stuff.
I'm welding myself pieces togeter to fab this thing up for making a die. I'm quite advanced, but I'd prefer to find an original version, since I recall a) one barrel fed each "half" engine (so long crosspulsing) but the plenums had some sort of special shape that I can't recall exactly. The most I got is that the divider wasn't a simple plain wall, it had some sort of )( shape and as you may see, the geomethry of the runners was revised. Cast iron, by the way.

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

It really sounds like a very interesting manifold; I hope you find one someday. I guess you already chase it on Mercadolibre and at the car swap meets.

So if you were to reproduce it...cast iron again, or maybe aluminum this time, do you think?

most of those manifolds are in hands of slant six racers of our stock class. teny're starting to use cherokee 3.0 L engines instead of slant sixes, so I guess that it might be a matter of time (my slant ain't going anywhere does yours? ) I dunno about casting... aluminium has achieved a great consistency over the years, and it's easier to work on. I don't have a super 6 aluminium manifold, otherwise I'd have Penin JR copycating me one of his dad's creations. He's not willing to work on iron but he said that he would recreate that mani on aluminium. Other option would be having him crafting one and copying that masterpiece. What's your input on material? If I'm gonna go aluminium I better trust on penin (I don't weld aluminium)

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

Well, if you're asking me which one I would pick? I would say aluminum. As you say, it is much less "exotic" now than it was 40 years ago (easier to get reliably good castings) and of course it is lighter, can be polished, and has other advantages for street-driven cars (comes up to temp faster for good cold behavior, cools down faster for good hot-start behavior).

I guess the aluminum would be easyer to work with.
Since you found a real foundry, maybe this would be a small thing, but you don´t need so much temp. to cast them with aluminum...
And try to make the carb-flange big, so it can be machined to any carb you want to run.