I've got a mild built 67 383. IT has 9.1 comp. with 516 heads with a mild port and polish with the big valves from a set of 906's. Comp. cam. 270/470 lift. I have this intake that I got in trade and I wondered if it would be a good intake or is it some fuel misser intake from the gas crunch era.

Sort of OK IIRC, just stay away from the Offy"dual port" those things are Rube Goldberg to the max :-)

Strange products came from offenhauser. That being said I will one day build a 360 using this with 2 eddy 500s.

Hey, I like those! Especially in the 440 flavor...
Get you some "antlers" and make you a riggy crossram!

Matter of fact, I think it is one of those dual port 360's.

Whats the deal with the dual port thing?

The "Dual port" was supposed to be strictly for fuel economy. The fact that the other manufactures did not jump in and copy the design states how well it worked. When the secondaries kicked in that mixture was delivered via the top portion of the manifold. This top portion was supposed to be cooler and more dense being farther away from the heat. In my opinion Offy made great racing engines (1930s-1960s?) but their street manifolds are inferior to Edelbrock, Weiand and Holly. The one line of intakes Offy made that were and are still excellent performers is their Port-O-Sonic series. Ironically with this manifold Offy deviated away from their traditional single plane wide open/split plenum design and went with a very familiar smaller plenum with longer runners- just like a Victor, Strip Dominator, Torker ect. Those things you could buy from offy to bolt to a dual quad intake to make a supposed cross ram- I think a cross ram in appearance only. I cant imagine it working very well. That being said I bought my above dual quad manifold new in 2004 from Summit. It was cast in 02. I LOVE underhood dual quads cuz it harkens back to a time where it was mandatory to switch to dual carbs to go faster! (409 chevy, 426 hemi, 413 wedge, 283 chevy) The intake I have is actually intended for a 273-318. It is a single plane though. I know an RPM or Stealth and a single carb would make more and better power but I love the look and I was even told by an old timer Edelbrock tech that the intake I have works very well on a hot street engine. Eddy used to make their D66 dual quad intake- for mopar 273-318 when they come up on the bay they are crazy expensive.

I have one in my garage,but in 440 form..I used it and found tons of bottom torque,,good for motor homes..but I switched to a Performer Rpm and with no other changes picked uo 4 tenths on my 1/4 time with a few hundreths slower 60 ft time.

Hey BossRide- I will sell you MY intake for just..................................3 EEEEEASY payments of $199.99! I believe they are still available new thru summit. I paid $240 back in 2004. I think the lower profile model that I have is a bit above $300 now. Offy made 2 models. The exact same manifold but the difference was the height of the carb mounting pads. Thus their term high rise and low rise. My manifold is the low rise. I wish Eddy would tool up (cast up) and make a dual carb dual plane manifold for 340-360 heads.

I haven't really heard of anyone being happy with the performance they give.