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3.1 to 3.8 sc??


gregsta565

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Hi, im new to this, not sure if this is where i should post, but im only 20, and i want to do my first engine swap, i have a 96 cutlass supreme with a 3.1 and i want to put a 3.8 sc in it, i heard the series 1 would be easier to do, is this correct? also what would all be needed? i can get a totalled buick with series 1, so i could take everything from that.. would i need its tranny? i dont know how hard this will be, and am wondering how long this would take since i would be without a car until its done, thanks

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A) Don't bother with the series I sc'd 3800, it isn't worth the hassle. Go with the series II or III

B) You don't want to do this if it is your only car....

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yes i know it would be some work, i know someone who did it in there monte, but can someone give me a list of everything, and if i should go with the series 1 or 2? like would i need different radiator..etc..? like i said i was offered a buick with i believe is the series 1 in it, its a 95, has 150k supercharger was rebuilt 10k miles ago, my 3100 has almost 200k on it, if theres no difference in ease i would like to go with series 2, but im not sure

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also i can always use my girlfriends car if shes not at work, ha, so wouldnt be completely without a car, im laid off at the moment so i have extra time on my hands, just wondering on average how long this would take, or has taken anyone that has done this?

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since you have a 96 this is a very easy swap. very straight forward, get a 98-99 monte z34 harness, or ltz.

 

plug and play, with the motor and trans from a donor car.

 

bolts right up aswell, you will ned a tune though

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do i need a "98-99 monte z34 harness, or ltz", or could i use the harness from the 3800 that i get, leaning torwards series 2 now lol

 

You don't "need" the 98-99 Monte/Lumina 3800 V6 harness, but IT will make things a lot easier since you won't have to do a lot of wire swapping/rewiring. If you need one of these harnesses, post a "want to buy" ad in the appropriate for sale section and I'm sure someone would be able to find you one at a reasonable price.

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A) Don't bother with the series I sc'd 3800, it isn't worth the hassle. Go with the series II or III

B) You don't want to do this if it is your only car....

 

Part B is what stopped me about halfway through the project to go back to a 3.4 DOHC. In all honesty, it is way easier and way cheaper to get far more performance out of a Camaro or Firebird.

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