Author Topic: Vortec TBI 4.3 to Carbed 350 swap  (Read 2453 times)

00XJ

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Vortec TBI 4.3 to Carbed 350 swap
« on: July 08, 2013, 08:19:38 PM »
I got a line on a carbed, complete 350 engine recently rebuild that I'm probably going to buy and put in my derby truck.

Truck has a TBI Vortec 4.3 in it right now, very tired motor and extremely gutless.


Anyone ever done a similar swap?

I know the accessories will swap over and the engine mounts, starter, radiator and everything will match up.

The trans will also bolt up from what i understand... but what is required to use an electronically shifted trans with a non-computerized motor?

What else do I need to look out for?

00XJ

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #1 on: July 08, 2013, 08:45:57 PM »
Nevermind, looking like a lot more work than it's worth... would probably be better just to run this motor till it's dead, take the scrap money and get another vehicle.

Southern_Pride

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #2 on: July 08, 2013, 10:49:49 PM »
Sell the trans, get a turbo 350. And you need to drop the tank and pull the pump and make a new pickup. Whole swap can be done in a weekend easily.

00XJ

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #3 on: July 08, 2013, 10:53:35 PM »
Won't need to be dropping tanks here, my friend :lol:



I have looked into it more and a 350/350 combo is clearly the best choice, BUT, will the TH350 mount up or do I need to fab a new cross member and shit?

I might just try to hot rod the 4.3 somehow to get me through the September race and focus on an engine/trans job over the winter when I have more time to figure things out. I think adjusting the throttle cable might help... if you watch my video you can see that it REALLY doesn't want to kick down, and apparently there's no kick-down cable on the 4l60e to adjust.
« Last Edit: July 08, 2013, 10:55:30 PM by 00XJ »

MadFairlane

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #4 on: July 10, 2013, 07:17:48 AM »
N20... Problem solved... Till it windows the block.
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jeepidude

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #5 on: July 10, 2013, 11:09:37 AM »
You'd prolly have to at least modify the crossmember, though making one is pretty easy on framed vehicles if it comes down to it.

Southern_Pride

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #6 on: July 10, 2013, 05:32:42 PM »
I don't think it has to be modified so much as moved. Just bolt it all in, drill new holes in the frame and your done.

00XJ

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Re: Vortec TBI 4.3 to Carbed 350 swap
« Reply #7 on: July 10, 2013, 07:06:55 PM »
I think I've decided just to throw a junk yard throttle body on it (it only seems to need one injector) and see if it'll run right. If it does, September's race will be its last anyway. I'll put the money I would use on an engine/trans, etc, into another vehicle. i could easily find a $500 truck on Craigslist.