I have never seen this configuration on an L6 before.  Must have been a real slug engine offered in the

lower end cars. Hard to believe they're still floating around out there. Must have been sitting in the

back of some warehouse covered in an inch of dust.

ok, slap myself for using the wrong search words.  This has been covered before. They came in the gloria.

That intake manifold looks like a clifford research 4 barrel manifold.

 

There was another odd single-carb setup on ebay recently - a '73 with what's apparently a downdraft Weber DAF(?) 2-barrel. Other details of the listing were a little "different" also.

http://tinyurl.com/myzjvya

There was another odd single-carb setup on ebay recently - a '73 with what's apparently a downdraft Weber DAF(?) 2-barrel. Other details of the listing were a little "different" also.

http://tinyurl.com/myzjvya

 

That doesn't look stock. He calls the original flat top su's `euro dual carbs`   He's got a lot of inaccurate things in that listing.

I'm curious why the seller says that it has Datsun Competition duel exhaust.  It looks identical to what I have, and I always thought it was a fabricated set of twice pipes.  The stickers on my glass packs say "Blue Knight"