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Engine Swap
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jbhrental
New User
| Posts: 1
| Joined: 12/08
Posted: 12/26/08
05:23 PM
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I have a 1991 Chevy S-10 Blazer with a non-Vortec 4.3L V6. What would be involved in putting in a Vortec 4.3L V6 and what modifications if any would be needed? Or would a Chevy 350 be a better option?
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esanchez
Administrator
| Posts: 1595
| Joined: 07/06
Posted: 12/30/08
10:52 AM
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Vortec should swap right in. You might need a new engine computer, but everything else should bolt right up. A 350 would be a relatively easy swap as well. I think the bellhousings on the back of the 4.3 and the later-model 350s are the same.
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oly..
New User
| Posts: 1
| Joined: 04/09
Posted: 04/30/09
03:16 PM
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i got a 91 gmc 1500 with a 4.3 v6 in it and i have a marine 2001 502 big block what do i ned to put it in see if you can help me with this
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esanchez
Administrator
| Posts: 1595
| Joined: 07/06
Posted: 05/05/09
10:36 AM
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Re: Big-block into a 1500. Well, first of all, you're probably going to have to upgrade to the 4L80 transmission. You're probably also going to have to do a custom driveshaft, and I would probably upgrade to a 14-bolt or Ford 9-inch rear end. It's not impossible, but it's not exactly a weekend project either. Naturally, new engine mounts, and heavier-duty front springs or torsion bars.
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