By golly it is. A 2 barrel.
Need advice for 340 intake swap
- Thread starter brophy
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Professor Fate
Push the button, Max...
Close- TBI started in '88, trucks only. Cars used an electronic feedback carb with the gen 2 electronic controller.
Looks like it may have a standard electronic ignition..?
OP, is there an ignition control box on the inner fender somewhere? Looks like this:
If it runs good like it is, I'd leave it the hell alone.
Professor Fate
Push the button, Max...
Check the firewall, driver's side.
trapster
Well-Known Member
I put a 4bbl 750 vac sec carb and intake on my 273, it had a 2 bbl. It was faster with the 2bbl. I wouldn't go over 600 cfm.
Looks like someone has been trying to hog out the primaries. It doesn't really look like a spread bore 340 intake any longer.
Must have been the previous guy I’ve done nothing to it lol.
Professor Fate
Push the button, Max...
It came off a '70 340, so it would have been a square bore manifold with an AVS, not a spreadbore manifold and TQ.
I was going to go with the edelbrock 1405. I’ve heard it’s relatively simple and would work alright.
Looks like a stock AFB/AVS pattern to me.
I was expecting holes on a 3462848 intake to look more like this one (not mine):
The one he posted looks like the primaries have been opened up to me.
Maybe it's the lighting or my eyes are shot (that's possible). Also, the primaries on his manifold look irregular to me.
The one he posted looks like the primaries have been opened up to me.
Maybe it's the lighting or my eyes are shot (that's possible). Also, the primaries on his manifold look irregular to me.
No you’re definitely right. Looking at them in person you can clearly tell.
There are a few variations. Throw in the TQ intakes and there are several variations.
Professor Fate
Push the button, Max...
That's a '68/'69 manifold (3/4" bypass fitting).
lemondana
BlackDart
Didn't back in the day-340 people would open up the primaries so they could use the 440 AVS?
Dartswinger70
Well-Known Member
Something like this has everything you need but opinions vary, I'm sure this is a knock off I bought mine from Mopar Performance 25 years ago. However if you found stock parts like distributor, Module and ballast resistor and the wiring harness you could make that work also.
Proform Parts 440-426 Proform Mopar Licensed Electronic Distributor Conversion Kits | Summit Racing
Proform Parts 440-426 Proform Mopar Licensed Electronic Distributor Conversion Kits | Summit Racing
Thank you very much!! I’ll add it to the list!
Swinger 340
Well-Known Member
Yes it is a 70', 4 bbl 340 manifold.
Woody500
Well-Known Member
As I've covered before, you end up with column of air the size of the port, drawing thru intake with occasional gains in torque, proven by Mercruiser on various engines, most obviously w/Square Port Manifold on Peanut Port BB Chevy heads(a huge easily seen difference and probably the easiest to search for details on). & heard some Ford engines, that I never heard details on,
And step on bottom of port 'mismatches' is best(least objectionable), as in a turn fluids go to the outside of turn & inside of turn is slow(think about boating on a river)
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Exactly. In other words.....it can have some positive effects. Besides all that, the engine is only going to pull in what it needs. It's not like air and fuel is gonna "pile up" at the intake port at the head. That ain't how it works.
If it runs and drives nice I personally wouldn't bother changing the intake.
I always tell people not to mess with daily drivers. They ususally end up a mess and then you'll wish you hadn't touched it.
Now, if you were going to do other things to increase performance maybe, but I would just leave it stock at this point.
Tom
I always tell people not to mess with daily drivers. They ususally end up a mess and then you'll wish you hadn't touched it.
Now, if you were going to do other things to increase performance maybe, but I would just leave it stock at this point.
Tom
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Dartswinger70
Well-Known Member
I have an 86 Mustang gt convertible other than maintenance I dont do anything to it its stock. Its a driver. fun too 
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