How To Change Out The Wiring Harness From A Vortex 1500 V6 To A V8

• #1

So I have a 96 K1500 4.3 right. Due to the fact you tin't find motor mounts for this particular truck, I was thinking of putting a five.7 vortec in it. I accept searched the forum some and come up empty handed. Certainly this swap has been done before right? I hateful not a carbed 350 just vortec version. Any thoughts, guidance, or other wise input would be appreciated. Thanks in accelerate.

• #ii

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• #iii

Ok lamentable. Approximate I missed information technology.

• #4

While there is practiced information in that thread, it's not the direction I'thou wanting to become. Don't take this the wrong mode, but in my thinking throwing a carburated ANYTHING in a vehicle is pretty straight forward. I'g more interested in going from a 4.iii vortec to a 5.7 vortec. I'grand planning on having the complete engine harness and ecu. I guess the first question that comes to mind is will 350 frazzle manifolds bolt to the 4.3 y pipage? I take my doubts but then again I was hoping some one has done this and could shed some light. I'k sure there is more than to it then remove and replace.

• #5

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It should. A 4.iii is a 350 - ii cylinders. Are y'all going TBI to TBI or Vortec to Vortec. This would be easier than going TBI to Vortec or vise versa. The TBI 350s had a Y pipe exhaust I think. Not certain about the sizes though.

• #6

• #vii

What tranny do you accept? If you take a auto so you have a mild stall converter by reusing your V6 converter. With a stick yous demand a V8 flywheel because they are balanced differently. Are you opposed to doing an LS swap instead? At a minimum you'll need the V8 frame side engine mountsand radiator shroud. I would upgrade to a 34" radiator and electric fans merely that is me. I'm fifty% sure that the frazzle is dissimilar (I don't recall how the exhaust drops on the the cpfi four.iii. Plain you'll need a complete vortec 350. I would use a 98+ due to tuning options inside the pcm. Honestly I would use an 0411 figurer. Theoretically y'all could add the extra wires and for the injectors and run a V8 reckoner on your current harness, you may take to extend some of the wiring that runs up to the crankshaft sensor, ac and alternator.

• #viii

I want to do the to the lowest degree amount of modding as possible. The original plan was to replace the 4.iii that slug a rod. But similar I mentioned earlier mounts wound that upwards. This truck is an old subcontract truck I'chiliad trying to get going for a friend. With that beingness said I'grand not realy interested in mods or performance, only want to go this truck dorsum on the road the quickest way possible.

• #ix

4l60E is the tranny lamentable left that out.

• #10

ala.frosty

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If you're going to the trouble of swapping in a V8, I'd suggest making information technology a gen 3 LM7 (bulldoze-past-cablevision '00 - '02). To get from 4.iii to 5.vii, yous demand to change the computer and wiring harness anyway, then jump up to a cheaper, more mod and more fuel efficient engine in the procedure. The 4L60E in your truck will work with the five.three just fine. There's a whole facebook group dedicated to exactly this bandy.

Source: https://www.gmt400.com/threads/info-wanted-on-v6-to-v8-swap-please.46105/

Posted by: holtvared1955.blogspot.com

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