engine swap ?

lee250 · 03-06-2009, 11:17 AM

I'm working on some trucks for a lady and she has 2 trucks. A 93 1500 with a 350 that destroyed itself and I think it is a 91, it's the next older body style, with a V6, I think it is a 4.3. The plan was to dump the 350 and put the V6 in the 93 cause the bodys good. They are both TBI so fuel isn't a problem and I'm told that the V6 will bolt to the trans in the truck so that isn't a problem. But my question is do I need to switch the computer and if I do do I need to switch the wiring harness or will the harness still work on the V6? Thanks in advance.

gmctrucks · 03-06-2009, 11:58 AM

Welcome to the club and howdy from TEXAS. Now I know your going to have to switch the computer but I don't know if your going to be able to get away with the wiring harness if not it's all there.

bradrhale · 03-06-2009, 03:49 PM

yes the trans will bolt up.

batty1214 · 03-06-2009, 06:50 PM

I know that the 4.3 will bolt up to transmission. and if the conectors are the same, you should be able to use the ecm from the 4.3 and just transfer it. This was the case when we swapped my buddies 4.3 out with a 5.0 v8.

lee250 · 03-07-2009, 10:06 AM

Thank, this help me alot. I'm actually a ford guy so I don't know alot about chevys.

03-06-2009, 11:17 AM	#1
lee250 Junior Member Join Date: Mar 2009 Posts: 2	engine swap ? I'm working on some trucks for a lady and she has 2 trucks. A 93 1500 with a 350 that destroyed itself and I think it is a 91, it's the next older body style, with a V6, I think it is a 4.3. The plan was to dump the 350 and put the V6 in the 93 cause the bodys good. They are both TBI so fuel isn't a problem and I'm told that the V6 will bolt to the trans in the truck so that isn't a problem. But my question is do I need to switch the computer and if I do do I need to switch the wiring harness or will the harness still work on the V6? Thanks in advance.

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03-06-2009, 11:58 AM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,033	Welcome to the club and howdy from TEXAS. Now I know your going to have to switch the computer but I don't know if your going to be able to get away with the wiring harness if not it's all there.

03-06-2009, 03:49 PM	#3
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,024	yes the trans will bolt up.

03-06-2009, 06:50 PM	#4
batty1214 Senior Member Join Date: Nov 2008 Location: Vernal Utah Posts: 1,135	I know that the 4.3 will bolt up to transmission. and if the conectors are the same, you should be able to use the ecm from the 4.3 and just transfer it. This was the case when we swapped my buddies 4.3 out with a 5.0 v8.

03-07-2009, 10:06 AM	#5
lee250 Junior Member Join Date: Mar 2009 Posts: 2	Thank, this help me alot. I'm actually a ford guy so I don't know alot about chevys.