I am buying a 2000 Blazer, i have a carburetored sbc 350 from the 70s that i want to have installed, Its sitting in an 89 Blazer that someone did cause the 89 came with a 4.3 how difficult will this be? Thank you in advance

 

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[QUOTE=mattyboy1963;627115]I am buying a 2000 Blazer, i have a carburetored sbc 350 from the 70s that i want to have installed, Its sitting in an 89 Blazer that someone did cause the 89 came with a 4.3 how difficult will this be? Thank you in advance. Motor mounts? headers? anything you can think of.

 

You can buy S10 V8 Conversion motor mounts.

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First question is, what emissions do you have to undergo? Swapping a carbed motor into an EFI motor will fail. If you convert it to EFI you'll then have to figure a way to pass the sniffer. If you have no emission testing you're pretty much home free on it then.


Difficult depends on your ability. There is an S10 V8 swap guide that you can buy somewhere. Lists everything you need.


You'll have to ditch the clutch fan on the V8 and go with electric radiator fans due to clearance. There are many threads here and on the web that show this step.


Luckily, the radiator, tranny, AC/Heater box, and drivetrain can all stay.


Now if you stay with a carb, you'll need a mechanical fuel system to deliver the fuel. If you go EFI, you can keep the fuel system untouched.


Headers can be modified if you have the headers to the V8. This will require welding and fabrication. Or you can buy a set of S10 V8 headers. If you have a welder and time, I would suggest modifying the V8 headers to fit. More time consuming, but may be cheaper.


And is this a 4WD model, or only 2WD? It matters some, plus depending on what one, you have more options for other mods that are not entirely engine related, but help performance if you're after that.

Welcome to the forum!

 

Xter, Thank you for your input, Its a 2 wheel drive, Yes im aware that il need a mechanical fuel pump, Can the existing tranny be ued or is it better to just put in the old school tranny? There are no emsisions testing here, Was hoping to get away with mounts.

 

You can use the existing transmission in your blazer as all 4.3 V6's share the same bolt pattern as a SBC. I would recommend at least doing the corvette servo mod to the transmission though. This is very simple, costs $17 dollars about, and you don't have to tear the transmission apart or take it out of the blazer what so ever. There are threads on this that can be found and is an easy job just requires some minor tools.

The corvette servo mod allows the transmission to shift from 1st to 2nd more quickly and efficiently because it has more holding "power" from when the 2-4 band is applied which will give you a quicker and firmer 1-2 shift.


My only word of caution on purchasing one, is sometimes they are sold with a longer pin. Do not be fooled, this longer pin is NOT required and makes no difference.

 

This is an old transmission I have in my garage. It's a 700R4 but it'll be the same as your 4L60E. In the picture I'm pointing to the servo cover which houses the servo I was talking about. It's located on the passenger side.





EDIT: I'm tearing this transmission apart anyways so here's what the assembly looks like. I pulled this out a few minutes after I showed you that picture.





Everything except the cover and the spring. You can see the spring inside the housing still there.

 

OK so the 2000 Blazer is a 4 wheel drive, can i still put my carburetored old school 350 in?