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Author Topic: 87 chevy tbi question  (Read 5540 times)

Offline treestandjunkie

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87 chevy tbi question
« on: March 03, 2010, 10:56:00 pm »
I have read some of your posts and you guys are extremely knowledgable of gm vehicles. So here is my question: I have a 98 chevy z 71 and want to take the vortec 350 out and put it in my 87 short wide K-10 which has a 350 tbi, np 205 transfer. I was wondering what all would it take to complete this swap. I am new here so Any answers I can get I would greatly appreciate. Thanks.
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Offline Captkaos

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Re: 87 chevy tbi question
« Reply #1 on: March 04, 2010, 01:13:38 am »
new fuel pump in the tank (90's TPI pump for f-body or vette) and the fuel lines off the back of the Vortec and of course the ECM/wiring.  Otherwise it should drop in, are you swapping to the electronic 4L60E?
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Offline treestandjunkie

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Re: 87 chevy tbi question
« Reply #2 on: March 04, 2010, 04:07:06 pm »
I was wanting to keep my trans it is a 350 t with the np205 transfer. Is there any specific info on doing this or should I just keep the tbi with a new manifold that will work with the vortec heads?
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Offline Captkaos

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Re: 87 chevy tbi question
« Reply #3 on: March 04, 2010, 04:23:18 pm »
If you are keeping the TH350 you just need someone to mod the harness AFAIK and the ECM.
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Offline treestandjunkie

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Re: 87 chevy tbi question
« Reply #4 on: March 04, 2010, 08:54:14 pm »
Ok do you know who can modify the ecm and the harness. I have owned a 85 and 86 chevy but not a 87 so dont know much about them. Thank you for the info.
« Last Edit: March 04, 2010, 08:56:05 pm by treestandjunkie »
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Offline VileZambonie

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Re: 87 chevy tbi question
« Reply #5 on: March 04, 2010, 09:46:39 pm »
Is your 87 already TBI?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline treestandjunkie

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Re: 87 chevy tbi question
« Reply #6 on: March 04, 2010, 10:09:53 pm »
yes vilezambonie it is tbi already. I just have a 98 z 71 that is wearing out (all except the motor) so I just thought if it wasnt to much trouble then I would swap engines. I am just trying to get ideas on what to do. My motor in my 87 is starting to smoke a bit.
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Offline VileZambonie

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Re: 87 chevy tbi question
« Reply #7 on: March 04, 2010, 10:19:46 pm »
You could swap it right in. Everything will swap except the intake manifold. You could pretty much run any vortec style intake manifold and just put a TBI adapter plate on it.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline treestandjunkie

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Re: 87 chevy tbi question
« Reply #8 on: March 05, 2010, 03:44:15 pm »
Could I not just get a tbi adapter plate for the 98 vortec stock intake?
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Offline VileZambonie

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Re: 87 chevy tbi question
« Reply #9 on: March 05, 2010, 11:20:22 pm »
No, it's an upper and lower plenum
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Offline treestandjunkie

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Re: 87 chevy tbi question
« Reply #10 on: March 05, 2010, 11:34:05 pm »
I think I am going to get a dual plane intake with an adapter and a spacer and call it good. Right now I am getting the front end rebuilt and then I will start looking for an intake and probably more info from you as I tackle this swap. Thanks for your help. If there is anything other than these parts that I am going to need feel free to suggest. I need all the help I can get.
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