is an intake different on a 383 compared to a 400 440?

[SteveSS]

I'm thinking about switching the 2bbl on the 1970 Coronet 500 383 to a 4bbl. I saw this on the local CL and he seems to think they are different.


This intake manifold is left over from an engine rebuild project I did on my 71 Dodge truck (383 V8).

I picked it up at a salvage yard locally thinking it would be the intake manifold I needed for a two barrel to four barrel conversion only to find out when I went to bolt it on that the bolt pattern on the block was different.

Long story short, I found what I needed somewhere else and this one is up for sale. I’m guessing this is for a Mopar 400 or 440 engine block.

It has been professionally cleaned, machined and painted.

Asking $150, but willing to consider trades or other offers.

Please do not contact me with solicitations or offers to help sell anything.

Thanks,
Wells

 

[Jerry Hall]

I thought all 383-400 intakes interchanged, except the early 383 RB engines.

 

[Lefty71]

So, 383 and 400 interchange. 440 does not, when it comes to intakes. All RB engines interchange with each other (413-426w-440 are RB's) All B engines interchange with each other (361-383-400 are B's).

There can be some complexity between 383 and 400 tho, when it comes to the carburetors themselves. For example, a later model Thermoquad is not going to fit an intake designed for an old AFB carb. Even the other way around can be a problem.

A picture of what exactly you have and maybe a casting number would help immensely.

 

[pnora]

So, 383 and 400 interchange. 440 does not, when it comes to intakes. All RB engines interchange with each other (413-426w-440 are RB's) All B engines interchange with each other (361-383-400 are B's).

There can be some complexity between 383 and 400 tho, when it comes to the carburetors themselves. For example, a later model Thermoquad is not going to fit an intake designed for an old AFB carb. Even the other way around can be a problem.

Yes. Same bolt patterns but the valley is wider on the RB due to the taller deck height.

 

[toolmanmike]

^^^^^^^^^^^^^^^^^^^^^^ Yep. 350, 361, 383 and 400 are B blocks. 413, 426 wedge, and 440 are RB blocks and take a different intake. Yes there's that odd 383RB from the late 50's

 

[DeltaV]

$150 is a good price from what I've seen advertised over the past several years. Especially good price since it has already been cleaned up (professionally cleaned and painted he said).

 

[SteveSS]

Here are his pictures from the ad. It's interesting that you bring up the Thermoquad because this is what I had laying around and I thought I'd use it. Are you saying no way?

 

[Photon440]

The pictures help.

That part #3898444-1 is a 440 intake.

 

[SteveSS]

Okay, that's a great help thanks. One more thing if you don't mind. Here's another I found. 1970. The ad says 383 or 440. But what you are saying is it wouldn't fit both. Kind of crusty but if it works I don't care. Different casting number from the first one I showed you. Maybe it's a 383.

Would my thermo fit this even if it is a 383 intake?

 

[toolmanmike]

Okay, that's a great help thanks. One more thing if you don't mind. Here's another I found. 1970. The ad says 383 or 440. But what you are saying is it wouldn't fit both. Kind of crusty but if it works I don't care. Different casting number from the first one I showed you. Maybe it's a 383.

Would my thermo fit this even if it is a 383 intake?

View attachment 1504722View attachment 1504723

No. THe T Quad won't fit on that manifold. Look at the bottom of tyour carb and the holes in the intake pictured and you tell us if it will work.

 

[toolmanmike]

Okay, that's a great help thanks. One more thing if you don't mind. Here's another I found. 1970. The ad says 383 or 440. But what you are saying is it wouldn't fit both. Kind of crusty but if it works I don't care. Different casting number from the first one I showed you. Maybe it's a 383.

Would my thermo fit this even if it is a 383 intake?

View attachment 1504722View attachment 1504723

The number is not clear enough to get a good read. I don't find numbers of that sequence in my book which often means the intake is off a truck engine.

 

[RemCharger]

400 down is a lowdeck
413 up is a raised deck
Nothings changed in 65 years regardless how the morons write their ads.

 

[RemCharger]

Okay, that's a great help thanks. One more thing if you don't mind. Here's another I found. 1970. The ad says 383 or 440. But what you are saying is it wouldn't fit both. Kind of crusty but if it works I don't care. Different casting number from the first one I showed you. Maybe it's a 383.

Would my thermo fit this even if it is a 383 intake?

View attachment 1504722View attachment 1504723

Thats a 70 71 era 383 intake. Probably the best one. It's a square bore.
Thermobogs are spread bores.

 

[DeltaV]

Very difficult to read the crusty casting number. I'll offer this though:

2951666 was used on '70 & '71 383-4V

 

[Daves69]

...

 

[SteveSS]

I couldn't find that intake part number anywhere either. There's one that checks out on Ebay as a 1968 1969 38'703 intake. That should work on a 70 383? I don't care about numbers matching. It's a 2806301. I'm glad I asked. There are such liars on the Internet.

 

[Daves69]

............There are such liars on the Internet.

Then too, they may not know either and just assume.

 

[Curiousyellow71]

If you want to run a Thermoqaud get a 400 intake...they made them from 72-78 and were all thermoquads. The later ones had a egr in the intake. Early ones like a 72 are getting rarer. The 383s never had a spread bore intake they were all square for a holley or the avs. If you want aftermarket the edelbrock performer 383 intake has both carb patterns for most any carb, it is real similiar to a oem 400 intake. A edelbrock performer rpm is for a square bore like a holley, it's also taller.
Or buy a Spreadbore carb adaptor, run a 383 intake and bolt on the thermoqaud. Not the best but they work.

 

[pnora]

I would verify the casting number. Intake Manifold 8-400 1976 GRAND FURY 911380 | eBay

 

[RemCharger]

I couldn't find that intake part number anywhere either. There's one that checks out on Ebay as a 1968 1969 38'703 intake. That should work on a 70 383? I don't care about numbers matching. It's a 2806301. I'm glad I asked. There are such liars on the Internet.

The 301 intakes some called the Roadrunner intakes. They're good as well. You just don't want a 67 down.