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Jon Short

V6 to V8 swap?

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Posted (edited)

My 2007 GMC Sierra Classic (06 style) has the 4.3l V6 in it. I'm looking to possibly swap the 4.3l out for a sbc 350. Anyone do this before that would be willing to give any advice? Is it even possible to do a swap like this on a truck this new? If it is possible, what will I need to do to make it happen? Thanks in advance!

Edited by Jon Short

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I haven't but consider supercharging that 6. Plenty of fun power.

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? LS swap. Not sure why one would consider an older SBC when an LS engine will pretty much drop right in.

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? LS swap. Not sure why one would consider an older SBC when an LS engine will pretty much drop right in.

Yup, getting an LS/Vortec engine of the same era would pretty much be plug and play; no special wiring required (if I remember correctly, the PCM connectors were identical regardless of engine size)

 

 

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The reason I'm asking is because I can easily get a sbc 350, and much cheaper. But I've also heard that swapping a 350 into it would be much easier as well. I've read other pages and people have stated that LS swapping isn't a walk in the park. They run into multiple problems (and yes I know doing any engine swap will have conflicts involved).

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I've done a few crazy engineer swaps and had them work. However I would do the LS over the SBC for sure. Much easier plus it could easily be legal with emissions.

 

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Go LS! Take advantage of modern tech if you are going to go to all this work!

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Wouldn't it be easier to sell the V6 truck just buy another truck with the V8 in it already??

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You'd likely have less issues swapping a motor from the same era (ie LS) vs an older engine. Also it'd have more power and be more efficient (and would resale easier too)

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