olds 307 to chevy 350 swap
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I would want to get a th350 becasue its going in an enduro car. I don't need overdrive. How do I tell for sure what model of tranny is in it? On the alluminum tag on it, it reads 84-01 263305. I don't know if that helps but it might. I don't have a motor yet but i know of a crate motor with like 30k on it. If I get a th350, will the drive shaft and everything else fit? Anyone know of a 350/th350 combo laying around?
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Bell housing should fit between the two and if memory serves, you can use the motor mounts. GM is usually pretty interchangeable.
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Wrong Chuck. Chevy is the odd duck of the GM fleet when it comes to bellhousings. You'll have to find a similar year GM car with a 305-350 for the donor stuff like mounts, pulleys, distributor, brackets, etc. The mounts also mounts on a Chevy engine are completely different and bolt into a different spot on the frame but, the holes should already be pre drilled so that shouldn't be a problem. You may need to get the p/s pump from the donor vehicle as well. the Olds bracket system is different than the Chevy and may not bolt up to the Chevy brackets properly. But for goodness sake, make sure your p/s pump is the same era of a vehicle. They switched to metric threads in the late 70's so an older pump will not work. one more thing, If memory serves me correctly, the fuel line is on the drivers side with the Olds engine and will have to re-routed to the passenger side when putting in a chevy engine. I could be wrong though. You may be fiddling around with the throttle cable too. I hope this helps a little.
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I have a q-jet carb. Would it be benificial to get rid of the computer controlled carb and distributor for a vacuum advance dist.? I might know of a wrecked caprice that could work as a donar car. Do you think it would be easier to just get a similar year impala? The one i know of I think has a 267 v8. I would do the same swap though. I will proably stick with the delta becasue I have it almost ready besides the motor swap. Thanks for the help but keep the opinions coming. Thanks again
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Ahh...I'll take the advice of wes here. The last Olds car I swapped a 350 into was a 1984 Cutlass (donor vehicle was a 1978 Chevy Pickup) and it pretty much bolted right in. I think we had one bolt on the bell housing that didn't line up, but all of the others did. The existing motor however, was not a 307 as is the case here, but was the 3.8 liter (I believe a buick motor). At any rate, I'd trust the advice that Wes provided here anyways. He's worked with them more than I have.
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tjamz wrote:
Ahh...I'll take the advice of wes here. The last Olds car I swapped a 350 into was a 1984 Cutlass (donor vehicle was a 1978 Chevy Pickup) and it pretty much bolted right in. I think we had one bolt on the bell housing that didn't line up, but all of the others did. The existing motor however, was not a 307 as is the case here, but was the 3.8 liter (I believe a buick motor). At any rate, I'd trust the advice that Wes provided here anyways. He's worked with them more than I have.GM used 2 different 3.8 engines back then. one is the grandfather of the 3,8 of today, the 231 cu inch buick engine which will not bolt up. The other was a 229 cu inch Chevy engine which will bolt up close to the same. That's probably what you had in there Chuck.
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95tsi wrote:
Would I have to weld that on or does it just slip on? And does it just have to be a th400 yoke to fit? The driveshaft would be smaller wouldn't it?You will need the yoke only. Find out what it came off of and go to your local napa and tell them you need a u joint with ends for each vehicle. Ex: 1974 Chevy C1500 with a 454/TH400 on one end and the year/impala on the other. I've done this countless times when i worked at napa.
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