Olds 307 questions

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Old Apr 11, 2013 | 09:39 AM
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Olds 307 questions

I found an Olds 307 that I'm thinking about buying for dirt cheap. The guy says it ran fine a yr ago. He has no use for it anymore. I'm going to look this weekend to see what code is on the heads. He does not know much about the motor or what it came out of. He's throwing in the working 200R4 and a engine puller to clean out his shop. I'm tired of borrowing everyone's engine puller I thought about putting this engine and tranny in my daughters 72 Cutlass Supreme until I had time to rebuild the 350. He said it comes with the computers for the engine and tranny. What would need to be done to make this run in my old car? Different distributor and carb? Or could they be modified to work without the computer? I'm assuming the computer will be a pain and would be easier to get rid of it.
Old Apr 11, 2013 | 11:29 AM
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carburetor swap, dist swap, hot air choke tube swap, engine side motor mount swap, steering pump fitting swap, and plug off all the un used vacuum ports.
If doing a trans swap as well, you will have to adapt a way to run the converter lockup function.
The 72 carb throttle linkage is not equipped to run the tv cable for the 2004r so you will have to graft the linkage together by welding it or swapping the arms, and the speedometer gear will likely be incorrect as well. The transmission crossmember will have to be moved back, and mounts swapped.

That's all i can think of off the top of my head right now.
Old Apr 11, 2013 | 12:02 PM
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I'd like the 200R4 to be a permanent swap so I'm ok with making that right. Could I not lock up the converter til I had time to get it right? I didnt think about the power steering pump not fitting. What's different there? Bolts not line up?
Old Apr 11, 2013 | 12:07 PM
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Originally Posted by 455man
I didnt think about the power steering pump not fitting. What's different there? Bolts not line up?
metric lines
Old Apr 11, 2013 | 12:16 PM
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Couldn't I put my pump from my 72 on the 307?
Old Apr 11, 2013 | 01:02 PM
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Originally Posted by 455man
Couldn't I put my pump from my 72 on the 307?
Maybe. pulleys are different and water pump lengths can be different
Old Apr 11, 2013 | 01:04 PM
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Originally Posted by J-(Chicago)
Maybe. pulleys are different and water pump lengths can be different
If you swap EVERYTHING as a complete set, it will work fine.
Old Apr 11, 2013 | 01:32 PM
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Ok. Gotcha. Thanks.
Old Apr 12, 2013 | 10:41 AM
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Originally Posted by J-(Chicago)
...engine side motor mount swap...
Depending on the chassis it's going into. 307 cars use the same Anchor 2328 motor mounts as 1969-72 BBO A-bodies.
Old Apr 17, 2013 | 11:01 AM
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Got the engine, tranny and cherry picker. Engine seems good. Not locked up. It's the 5A heads with a cast iron 17 intake. So I'm thinking an 82-84 Y engine. It has electronic distributor and carb. Can I remove the electronics from the dist/carb or do I need to just get different ones?

I'm going to change the tranny fluid and filter and maybe a light shift kit before putting it in the car. These will be going in a 72 Cutlass Supreme temporarily until i get time and money to rebuild the '72 350. Could be a few years.
Old Apr 17, 2013 | 11:30 AM
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Originally Posted by 455man
Got the engine, tranny and cherry picker. Engine seems good. Not locked up. It's the 5A heads with a cast iron 17 intake. So I'm thinking an 82-84 Y engine. It has electronic distributor and carb. Can I remove the electronics from the dist/carb or do I need to just get different ones?
Different ones. Note that the 307 CCC distributor doesn't have a vacuum advance can, nor does it have mechanical advance weights. The advance curve is controlled by the ECM. The carb doesn't have normal primary rods, it has the spring-loaded rods that are controlled by the PWM solenoid, which is again controlled by the computer.
Old Apr 17, 2013 | 11:41 AM
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Ok thanks. I've found a cheap distributor that I will get and have a carb but it needs rebuilt.
Old Apr 19, 2013 | 04:29 PM
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Originally Posted by 455man
Ok thanks. I've found a cheap distributor that I will get and have a carb but it needs rebuilt.
Just out of curiosity, what distributor did you go with 455man?
Old Apr 20, 2013 | 07:13 PM
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I got an HEI off craigslist for $15.
Old Apr 20, 2013 | 09:15 PM
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Love my 307 for highway cruising and decent gas mileage in TX.

Saw your hometown? Wichita KS cool I was born and raised there!
Old Apr 21, 2013 | 06:20 AM
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Here's a simple diagram to help you wire up the locking torque converter.
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Old Apr 21, 2013 | 10:01 AM
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Originally Posted by M-14
Here's a simple diagram to help you wire up the locking torque converter.


Couple of issues here. First, depending on the original trans application, the fourth gear pressure switch in a 200-4R can be either normally open (closed under pressure) or normally closed (open under pressure). This wiring diagram only works with the normally open style. switch. You'll need to verify which one you have first. Simply check for continuity between the switch terminals with no pressure. If it's closed, it won't work.

Second, this circuit, while simple to wire, has lockup at all times when in O.D. The factory lockup applications that did not used a computer instead used a vacuum switch in the circuit. Under conditions of low manifold vacuum (ie, at part throttle and above) the vacuum switch opens, unlocking the converter. This helps with part throttle passing on the highway (or when you are climbing a hill), prior to trans downshift. These vacuum switches are available - look for an early 1980s GM pickup with 700R4 and no computer.
Old Apr 23, 2013 | 10:39 AM
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Thanks guys.

Yes Devil I'm in Wichita. Not too many Oldsmobiles here.
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