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What can I do with my 326?

2971 Views 85 Replies 24 Participants Last post by  DustyOldGTO
Hi folks, I just purchased a 1967 Lemans with a 326 & a 2 barrel carb. The car is pretty original so I want to stay with the 326 for now but I’ve never owned a Pontiac before. My experience is with Chevy small blocks & my previous Buick 350.

Right now the 326 runs decent but everything is leaking so I’m thinking of pulling the motor to reseal it, maybe freshen it up depending on what the compression readings are. What are my options at this point, can I make the little 326 a decent street runner or should I just start saving my money & energy for 400? Is it worth doing the traditional cam, four barrel intake & headers or just move forward with a new build?
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Hi folks, I just purchased a 1967 Lemans with a 326 & a 2 barrel carb. The car is pretty original so I want to stay with the 326 for now but I’ve never owned a Pontiac before. My experience is with Chevy small blocks & my previous Buick 350.

Right now the 326 runs decent but everything is leaking so I’m thinking of pulling the motor to reseal it, maybe freshen it up depending on what the compression readings are. What are my options at this point, can I make the little 326 a decent street runner or should I just start saving my money & energy for 400? Is it worth doing the traditional cam, four barrel intake & headers or just move forward with a new build?
326 is a great motor. (No worries, all American engines leak from everywhere.) One of the car shows on TV just rebuilt a 326 and got almost 400 hp with not to much money.
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326 is a great motor. (No worries, all American engines leak from everywhere.) One of the car shows on TV just rebuilt a 326 and got almost 400 hp with not to much money.
None of my cars and trucks past and present have leaked, 25 years in this house and not a spot on the garage floor and all of them American ....just saying ;)
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i would replace the seals clean it up and drive it like i stole it. a edelbrock performer intake would work very well on that 326. maybe run one breather. it would give time to think about what you want to do. and enjoy the car. lots of fun to be had with that car.
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326 is a great motor. (No worries, all American engines leak from everywhere.) One of the car shows on TV just rebuilt a 326 and got almost 400 hp with not to much money.
Hogwash. I resealed my '67 GTO 12 years ago and it doesn't leak a drop of anything. I can drive it 260 miles to visit friends in NorCal and park on their cement drive overnight and not one drop. Don't try that with any late model German car!
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Ames carries breathers...

This one is for the one that screws into the oil cap hole...

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This one is the push in style. Not sure why it say 64...I'd double check with Ames on fit for your car, but my 67 came with the one that screws in only and I'd bet they will work for your car.

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You'll need the grommet for the one above...

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A few things I noticed in your photo. Someone has installed a ballast resistor on your firewall. Maybe someone had issues with the original wiring sometime in the past.
Something to think about as well. If the engine has been swapped like you said, it may not be a 326. It is possible they could have found an engine to replace the original and just reinstalled all the 326 components. Would be pretty cool if that bad boy was really a 389 or something. Look at the front passenger side of the block to check the two letter code for the block ID.
Another quick check you can do is look at the side of the block at the freeze plugs, If there are only two it's a pre 1967. If there are three plugs is 67 or newer.
Also it appears one of the alternator brackets are missing. Someone correct me if I'm wrong but I thought the extra bracket was added in 67.
Jim
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This car has a ton of potential. Decide what you want to do with and and do it. Transmission would be my first swap. Pick one that'll work as a direct drop in. I wouldn't want to modify too much if this was my car. Check compression to see if you have a weak hole and reseal the oil leaks. Paint the engine or don't. That being said, a rebuild with a stroked crank would be an odd ball on here. I think the 326 can be stroked up to a 375 and not much larger because of the piston diameter. Personally, I'd day 2 this car and keep everything that came off of it. There are way more GTOs left than LeMans and Tempests. Welcome from another LeMans owner!

If you're having issues with breathers, I know a guy who has porn type pictures on his (@Baaad65 )
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What Jared said. Leave the engine mechanicals alone and just re-seal it. Tranny swap will wake it right up.
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It does have a PCV valve, I pulled it & it rattled so it’s not stuck. Here’s a pic under hood, I’m not sure that it’s the proper hose routing but it looks old…
Yeah... but you dont have any breathers! So a PCV valve is useless.
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Yeah... but you dont have any breathers! So a PCV valve is useless.
No, it's not useless. His system is a 'closed' Type 4 system. We've had them in CA going on 60 years. No open vents allowed. This state was screwed up even back then. The closed system works just fine, sucking crankcase fumes into the carb and burning them. The open breathers are preferable to stave off oil leaks when you have a worn engine with a lot of piston blow-by.
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yes, i meant useless for helping oil leaks
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Agreed. Breathers are your friend when it comes to helping seeping gaskets!
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If that engine was human it would have one hand pressing the nostrils closed and the other hand firmly over the mouth.

Let it breathe.
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Thanks for all the advice, I’ll have a breather on it by the weekend!
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Thanks for all the advice, I’ll have a breather on it by the weekend!
Buy two, they're small
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Buy two, they're small
Ha! Will do!
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I go along with the comments about tightening up the 326 2bbl and keeping it around. For a street car, the 326 will be just fine and a lot of fun.

For upgrades, I’d just focus on reliability items like an electronic ignition if it still has points, check the wiring over and particularly make sure all the grounds are clean and tight. Dual exhaust would be a nice upgrade for sure. If you gotta have a little more “pop” under the hood, maybe slip in a mild, street friendly torque cam or a “one step up” factory profile (068?) while you have it apart. Don’t be tempted to go overboard with the cam, it’ll ruin the party.

My ‘69 LeMans with factory 4 speed presently has it’s original, bone stock 2bbl 350. It’s got it’s share of drips and pretty rough looking too. However, it starts and runs like a Swiss watch and surprises a lot of people how good it runs with the 2bbl carb and log exhaust manifolds. But alas, I’m upgrading to a 455 very soon.
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It does have a PCV valve, I pulled it & it rattled so it’s not stuck. Here’s a pic under hood, I’m not sure that it’s the proper hose routing but it looks old….
View attachment 164484
View attachment 164483
PCV is routed correctly, but the T fitting is not correct. It should be a nylon F fitting. Ames is reproducing them.
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My suggestion be it as humble as can be. EBay a good running 400 or 326. For less than $2500. Install and drive now. Yank your 326. Take your time. Flux it and rebuild it. Reinstall next year or five years later. Everyone appreciates a stocker.
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