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OK, that's a first for me. I've never seen an aftermarket dual Qjet manifold before, only the dual square bore manifolds. Very cool and I expect quite rare.
one would think there would be a number somewhere,i can find nothing,inside out or underneath.got it off ebay cheap,thought it would be a conversation piece on the car,and different. 2 dual jets maybe?
These photos illustrate the difference between a divorced choke manifold (the red big block manifold shown) and a hot-air choke manifold (the gold small block manifold shown), a well as the difference between a big block manifold and a small block manifold.
Gold 1970 Small Block Manifold with Hot-Air Choke on Left,
Red 1968 Big Block Manifold with Divorced Choke on Right
I guess I missed the divorced choke detail or didn't understand what that was, when I compared the casting numbers near the "firing order" on both manifolds.
So now, it looks like I still need a manifold for a 1972 350 if anyone has one.
Last edited by tcolt; February 6th, 2016 at 11:43 AM.
A picture of the 1965 only square-bore Big Block (400/425) 4bbl intake. Letter code: "B" GM PN: 384439
Interestingly even though it's referred to as a square bore manifold the bore sizes are different. The front measures approximately 1.56" while the secondaries are 1.69"
I really rare Jetfire turbo intake with the SAMPLE cast into it. Nobody really knows what the SAMPLE was about but I only know of 2 of these out there.
Decided to take a better picture of now rare but basically worthless 1972 Oldsmobile small block 2bbl intake manifold 13-410670 before I scrap this one - thus making it even rarer.
Cool thread. I’ve always wondered what was out there for the Olds 455. Here are my two offerings, pretty redundant now. Professional Products Crosswind 57026 & Holley Street Dominator. The HSD is possibly going to have a Brodix Turtle installed to cover the EGR hole at the bottom of the plenum. Research has brought up mixed thoughts on that. Dual plane Air Gap manifold that is 6.25” tall. Might have fitment issues in my 67CS. Single plane intake that is about an inch shorter than the dual plane. When pondering ways of filling the hole on the plenum floor I thought maybe this can be useful. Thoughts?
March 22nd, 2014, 03:17 PM
