Need engine swap advice -1986 Monte Carlo Ls

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Andebe

Greasemonkey
Mar 6, 2017
241
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Indiana
Ok, that being said do you think the 350 is the correct choice for what I'm looking for? Really looking for consistent everyday driving as opposed to power and speed.
If thats the case,cheapest would be a used 4.3.
 

L67ss

Royal Smart Person
Dec 8, 2016
1,350
420
63
Ok, that being said do you think the 350 is the correct choice for what I'm looking for? Really looking for consistent everyday driving as opposed to power and speed.
305 might be a good choice if you go used. Will give it more pep along with better mpg. And if you keep the TBI a 4.3 has the same injectors as 350 so it'd be slight tb upgrade for the 305. And a Lotta places you can get a 305 nearly free
 
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Speedy94c

Apprentice
Sep 3, 2016
58
25
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I looked on Car-part.com in your area, (PA) and there are several used ones to choose from around $300 to $400 for the 4.3 which would get you going as a DD sooner than later.
 
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Opie Knievel

Rum Fueled Midnight Mechanic and Moderator
Sep 6, 2010
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Brodhead, Kentucky
The 4.8 & 5.3 Vortec IS NOT THE SAME AS A 350 Vortec or any 350 for that matter. You want a Gen 1 small block or a replacement 4.3.

The 4.3 isn't a bad daily driver engine if you're not worried about going fast. It's kinda torquey.
 

L67ss

Royal Smart Person
Dec 8, 2016
1,350
420
63
If thats the case,cheapest would be a used 4.3.
In my experience a used 4.3 ends up still costing more. Newest direct swap 4.3 is 22 years old. Also 4.3 s10s(likely donor) tend to be some of the most abused vehicle's. Basically a used 4.3 is a timebomb
 

Andebe

Greasemonkey
Mar 6, 2017
241
256
43
Indiana
In my experience a used 4.3 ends up still costing more. Newest direct swap 4.3 is 22 years old. Also 4.3 s10s(likely donor) tend to be some of the most abused vehicle's. Basically a used 4.3 is a timebomb
I was thinking,smallest labor costs.
 

L67ss

Royal Smart Person
Dec 8, 2016
1,350
420
63
Only difference in labor is about 30 mins to swap motor mounts
 

Andebe

Greasemonkey
Mar 6, 2017
241
256
43
Indiana
Only difference in labor is about 30 mins to swap motor mounts
Then I agree with your post,for getting a used 305. Usually cheap,good on gas,and able to get something a little newer.
 
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L67ss

Royal Smart Person
Dec 8, 2016
1,350
420
63
And should op wanna go 350 later all swap work will be done
 

pmoore4321

Greasemonkey
Dec 10, 2009
107
97
28
Houston, Texas
Cost difference between going 350 or 4.3 is MAYBE $100. New 4.3s can be costly. As long as you get the right manifolds the only parts you HAVE to buy are the motor mounts(<$20)

I hope the OP keeps us updated. I want to see the $100 premium 4.3 to 350 conversion.
 
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