[WANTED] Offenhauser Intake Manifold
- Thread starter joseph eichner
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krazykuda, Engine numbers on the block are a-273-2-4
What matters is what heads are on it...
The 273 had a different intake to head bolt diameter and angle than the 66 and later 273-318 etc... The early style had 5/16" bolt diameter where later style is 3/8" diameter intake bolts...
In other words, the 64 and 65 273 heads are different than the rest of the other years... If you still have the original heads, then you may want to look for the early style bolt pattern intake...
Or if it has 66 and later heads, or swap some 66 and later heads on it, then you can use any standard intake for the LA style small block...
Look at the casting numbers on the heads, then look them up on this chart:
MyMopar - Mopar Forums & Information - Mopar Head Casting Numbers 1959-1978
krazykuda,
I will do that be right back again, have to go down in garage. I have been telling my friend I think its early model because the car has a Velocity Boot and some other things I read about that tell me its a early model.
Lots of running up and down stairs but my wife said I can afford to loose some weight. LOL. They measure 1/2 and the number on the intake is 2465726 if that can be crossed reference with something. Also I could not find a number on the heads.
Ok, that's the original 65 273 4 bbl intake with the early bolt diameter and angle...
I'm not sure if Offenhauser made an intake for those, but I know Edelbrock has a great intake for those heads if you can find one... They are obsolete and in high demand because they work so good...
The Edelbrock D4B is the correct intake for that application...
Not the Edelbrock LD4B which is for the later style head bolt angle and diameter...
Or you can get the 'regular' intake and test fit it... If you need to, you can open up the holes in the intake to fit the angle difference...
Or swap some 66 and later 273/318 heads on it and any intake will fit...
krazykuda, Thanks so much for your help and information, also when you told me to measure the bolts it struck me that I had read about that once before on this Mopar site. I don't remember things until someone tells me again and some times again. But you say the bolt size of all things will tell you early or late model 65 intake manifold. I really find little things like that very interesting. Thanks joe.
grimreaper
Cross Member
Offenhauser did offer the Dual Port 360 to fit the 64-65 heads.
grimreaper, Thanks,I will also look into this. Joe
Offenhauser - The Greatest Name In Racing Products and then download catalog.
I counted 7 different manifolds they made for the 64-5 273.
I counted 7 different manifolds they made for the 64-5 273.
Great, just what I like, more choices.
Well, there are spread bore and dual quad manifolds. That crosses quite a few off the list. They are in the catalog but I wonder how many are in stock or if they still cast them all. The D4B would be my choice.
Yes, That D4B I've been looking for on line between finding one and prices. But you all know when you type in what you want every thing pops up that you are not interested in. So I am trying. Thanks, Joe.
Not the dual port that you mentioned, but it is an Offy 360° intake for the 273... This one should be good also, and less restriction on the top RPM range...
[FOR SALE] - Offenhauser 273 4 barrel intake 64-65
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