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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: treestandjunkie on March 03, 2010, 10:56:00 pm

Title: 87 chevy tbi question
Post by: treestandjunkie 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.

Title: Re: 87 chevy tbi question
Post by: Captkaos 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?

Title: Re: 87 chevy tbi question
Post by: treestandjunkie 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?

Title: Re: 87 chevy tbi question
Post by: Captkaos 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.

Title: Re: 87 chevy tbi question
Post by: treestandjunkie 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.

Title: Re: 87 chevy tbi question
Post by: VileZambonie on March 04, 2010, 09:46:39 pm

Is your 87 already TBI?

Title: Re: 87 chevy tbi question
Post by: treestandjunkie 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.

Title: Re: 87 chevy tbi question
Post by: VileZambonie 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.

Title: Re: 87 chevy tbi question
Post by: treestandjunkie on March 05, 2010, 03:44:15 pm

Could I not just get a tbi adapter plate for the 98 vortec stock intake?

Title: Re: 87 chevy tbi question
Post by: VileZambonie on March 05, 2010, 11:20:22 pm

No, it's an upper and lower plenum

Title: Re: 87 chevy tbi question
Post by: treestandjunkie 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.