Is this the correct intake for a 383 Shaker ?

[Racer57]

70 Cuda 383 with shaker
Number on intake is 2951666-1 and carb is an Eldebrock 1406 600cfm.

I know this is an intake for a '70 4barrel 383 but does it have 4 holes for the carb instead of being a dual or single plane? The more I think about it, the more I wonder about the spacers, they are 1/2" and 3/4". Did the factory use them ?

I'm wanting to put a 750 on the car and I haven't decided what to do about the intake yet.


 

[4 speed fish]

The factory did not use spacers.

[Racer57]

The factory did not use spacers.

If the factory did not use spacers, then what manifold was used ?

[hemiken]

The factory used a 4 barrel manifold with no spacers, the difference was that the Shaker bubble itself sat lower than what the 440 and HEMI Shaker bubble sat, pretty sure the 383 and 340 Shaker bubble sat around the same height in fact Their is also a special section built in to the Shaker base plate, and was in all Shaker base plates made, but was only used on the 383 Shaker assembly. If you look at the base plates, you will see a circle dimpled/recess section that is made to accept a washer, from that washer their would be a hole, and a one application only specific to 383 only the hex shaped rod with thread on each end, one end will screw in to the center of the block valley pan at the front, the other end will have the thread hanging through the base plate to allow for a wingnut.

[Racer57]

The factory used a 4 barrel manifold with no spacers, the difference was that the Shaker bubble itself sat lower than what the 440 and HEMI Shaker bubble sat, pretty sure the 383 and 340 Shaker bubble sat around the same height in fact Their is also a special section built in to the Shaker base plate, and was in all Shaker base plates made, but was only used on the 383 Shaker assembly. If you look at the base plates, you will see a circle dimpled/recess section that is made to accept a washer, from that washer their would be a hole, and a one application only specific to 383 only the hex shaped rod with thread on each end, one end will screw in to the center of the block valley pan at the front, the other end will have the thread hanging through the base plate to allow for a wingnut.

Thanks. I'm starting to suspect that I have a 440 base plate. The throat only extends about 3/4" past the main plate and even though there's a dimple, there is no hole to allow for the rod.

Anyone wanna swap their 383 base for my 440 base ?   

[Chryco Psycho]

or use the spacers with the 440 base plate to get up to the corrct height

[hemiken]

Thanks. I'm starting to suspect that I have a 440 base plate. The throat only extends about 3/4" past the main plate and even though there's a dimple, there is no hole to allow for the rod.

Anyone wanna swap their 383 base for my 440 base ?   

You can still use the Shaker base plate you have, all you will have to do is drill a hole in it to allow for the rod is all, i will have to dig out a picture for you of the rod, i have it on another USB stick somewhere, i think i know where it is, so i will dig it out and show you. But remember in doing this, it will drop the complete Shaker unit as a whole down substantially, it looks as if your Shaker is sitting high in your signature picture, when looking front on at a Shaker scoop on either a 440 or HEMI car, the bottom of the Shaker grilles are level with the trim ring on the hood, when you have a 340 or 383 engine, the whole Shaker assembly drops down lower in the hole in the hood. Just make sure this is what you want as it is visually a very big difference. I will dig out the picture regardless and show you.

[Racer57]

Here's my primary concern... I'm wanting to put a Eldebrock 750cfm carb on the car to replace the 600 that's on it now. The car runs ok presently but I'm afraid that with all those spacers that it will create drivability issues with a 750.

Is the factory 383 intake # 2951666 a single plane, dual plane or does it have 4 separate holes ? I haven't pulled the carb off yet and don't want to break any gaskets until I know wtf I want to do.

Is an Eldebrock Performer dual plane intake gonna help the engine any over the stock one ?

[hemiken]

The Edelbrock Performer is a little bit better than a stock factory 4 barrel, but the better intake again would be to get the Edelbrock Performer RPM intake, this would be suited to your needs, you will not have trouble with or without the spacers, the only issue with taking the spacers out will be that you will most likely have to swap out the carby studs to shorter ones with no spacers.
I do not have a parts breakdown book in front of me to look up what intake you have on your engine right now to check for you. sorry.

[Racer57]

Thank you !

Assuming the Performer carb mount is the same as my stock intake, the Performer  RPM is 1.35" higher which does eliminate the 1.25"(plus additional gaskets) that I presently have. The RPM also does not have the EGR holes or the choke heat pot the Performer has !

[moparman82]

Please don't get an edlebrock! Lol look for a carb thread on here, or ask chryco phsyco, he can give u much better recommendations

[Chryco Psycho]

If you have to use an Eddy carb use the AVS style Thunder series , far better carb than the AFB 750
I would use a Proform though

[Racer57]

If you have to use an Eddy carb use the AVS style Thunder series , far better carb than the AFB 750
I would use a Proform though

I was wanting to stick with an Eldebrock because I know that my fuel lines and linkage will all fit without any changes.

The Eldebrock Performer series offers a 750 cfm (#1411), but the Thunder series only offers a 650 (#1806) or 800,  no 750.  Considering I have a 600 (#1406), would I see much difference with the 650 ?

My engine is a stock HP383.

[Chryco Psycho]

Use the 800 , with the vacuum secondary it will not over carb

[Racer57]

Use the 800 , with the vacuum secondary it will not over carb

You know a hellva lot more about this subject than I do. Its been over 30 years since I worked on these engines.

 But I have to ask one more time just to be sure...... Considering I have a stock HP383 including stock exhaust manifolds and a Tremec 5 speed, you feel that the Eldebrock Performer RPM Intake #7186 and the Eldebrock Thunder Series AVS Carb #1813 is a good match for my engine ? The car will be just driven around town with very few hard throttle hits.
Thank you VERY much for your time in this matter.