Replacement carburetor recommendations

[Brownie82C10]

Hello, all.

Among other repairs, my mechanic says I could use a replacement carburetor for the 16-year-old, single-barrel replacement carb I have now. He said he's done all cleaning and tweaking he can do, but something "is still holding back" better performance. He thinks a new carb would be the solution or the biggest part of it.

I have a 1982 Chevy C10 with a 4.1-liter straight 6. It's not a showpiece truck. It's my daily driver. I don't have any other vehicle, so I'm very grateful for the truck. (I bought it used 26 summers ago.) It has 291,000 miles on it now, and I put about 70 miles on it weekly. Plus, I take it on a 2,000-mile trip each summer.

I'm looking for good, factory, OEM-type performance with decent gasoline mileage (decent for the year this truck was built). I'm not into hot-rodding and truck shows — at least not now. I don't know the brand/model of the carb I have now. Another mechanic who used to be a neighbor installed it for me. He didn't share many details and I didn't ask enough questions.

Both my current mechanic and I are researching this. What are my options? I sense that there are plenty.

Thank you.

 

[ali_c20]

I have good experience with Autoline rebuild carbs.
Have one on the 66 Impala and the 69 Mustang. If you want good mileage stick to the Rochester it was equipped with.
You can tune the carb anyways. I don't know if there are a lot of aftermarket carbs for the L6 that don't require an intake change.

Have you checked if the timing is set right and the ignition is all good? Very often the carb is not the reason for engine troubles it's wrong timing.

 

[xm20k]

That kind of milage and an inline 6 with a single barrel I'd tune it the best you can than save my pennies and do a swap even if just a reman/junkyard SBC it'll feel like a new truck, will haul better, get to freeway speeds better, passing would be better just overall would be a better experience even a 160-200HP stock engine would be better than a tired I6.

Just throwing it out there with that kind of milage almost 300k It may not be long before it will need a replacement or rebuild and the I6 really isn't worth putting that kind of money in.

 

[Ricko1966]

Paying someone else to do a small block swap on a truck that has been good to you as is for 26 years,doesn't sound like the best solution to me. If a person was doing their own work and weren't happy as is,with their 6 cylinder truck heck yea a small block swap would be a great suggestion. But there are a lot of things going to nickle and dime this,if you have to pay someone else. And if you live somewhere with emissions inspections,there's another problem. As for a carbureator for a stone stock 6 put a good reman from a reputable rebuilder like national carbureator on it. There is no since in trying to modify a tired 6 cylinder you'll probably get more problems than solutions

 

[82Diesel]

The inline six is the best mpg / learners engine for a 16 yr old kid. Rare to see nowadays in a square body. Will outlast a v8 x2 no problem.

 

[legopnuematic]

Some pictures of the carb on the truck currently would help, with the collective knowledge here, we should be able to give an ID to what is on it now.

 

[Grit dog]

Agree a SB swap on an only vehicle daily and not able to do any of it yourself is a bad investment.
Best plan is find another vehicle and even then the SB swap will be more $ than the truck is worth.
Why not rebuild the carb? $30 and an afternoon made my old I6 jeep run like new for going on 15 years now.

 

[xm20k]

I'm not even finding a 1 barrel carb listed for an 82 I6 only a 2 barrel.

https://www.summitracing.com/parts/urm-3-3781/make/chevrolet/model/c10/year/1982

 

[Ricko1966]

I'm not even finding a 1 barrel carb listed for an 82 I6 only a 2 barrel.

https://www.summitracing.com/parts/urm-3-3781/make/chevrolet/model/c10/year/1982

Should be a varajet 2bbl

 

[Grit dog]

If it really has a 1bbl which is quite odd and unlikely, it would also have to have some homemade adapter for the intake or possibly a very old 1bbl intake manifold (if it would even bolt) Also seems highly unlikely.
However if the mechanic cannot figure out how to find a proper new carb or rebuild the existing one, unfortunately your mechanic is also a problem.
Or do you even have a problem or just looking for more performance?
If the latter is what you’re after, find a different vehicle or get ready to spend some real $ on this.

 

[bucket]

If it really has a 1bbl which is quite odd and unlikely, it would also have to have some homemade adapter for the intake or possibly a very old 1bbl intake manifold (if it would even bolt) Also seems highly unlikely.
However if the mechanic cannot figure out how to find a proper new carb or rebuild the existing one, unfortunately your mechanic is also a problem.
Or do you even have a problem or just looking for more performance?
If the latter is what you’re after, find a different vehicle or get ready to spend some real $ on this.

I can see it. They said they got it 26 years ago. 26 years ago, my '79 K5 had already had an earlier model 250 swapped in at some point prior to that. Iirc, it was a 1bbl. I didn't realize it was not the original engine until I went to replace the valve cover gasket and the one's listed for '79 were nowhere close to being right.

 

[AuroraGirl]

If it really has a 1bbl which is quite odd and unlikely, it would also have to have some homemade adapter for the intake or possibly a very old 1bbl intake manifold (if it would even bolt) Also seems highly unlikely.
However if the mechanic cannot figure out how to find a proper new carb or rebuild the existing one, unfortunately your mechanic is also a problem.
Or do you even have a problem or just looking for more performance?
If the latter is what you’re after, find a different vehicle or get ready to spend some real $ on this.

the monojet was used until the 197..9? year and then the varajet

The varajet engines ditch AIR and have a integrated head so a positive and a negative

 

[Turbo4whl]

Some pictures of the carb on the truck currently would help

I'm not even finding a 1 barrel carb listed for an 82 I6 only a 2 barrel.

If it really has a 1bbl which is quite odd and unlikely,

So, the '82 250 6 cyl. (4.1) was built with the integral head/exhaust manifold. They cracked, exhaust leak happened. The replacements were hard to get. The quick fix was pull everything from the head up from the older 250. Plenty of these in the salvage yards.

This would have a 1 barrel carb.

I can see it. They said they got it 26 years ago. 26 years ago, my '79 K5 had already had an earlier model 250 swapped in at some point prior to that. Iirc, it was a 1bbl. I didn't realize it was not the original engine until I went to replace the valve cover gasket and the one's listed for '79 were nowhere close to being right.

 

[xm20k]

So, the '82 250 6 cyl. (4.1) was built with the integral head/exhaust manifold. They cracked, exhaust leak happened. The replacements were hard to get. The quick fix was pull everything from the head up from the older 250. Plenty of these in the salvage yards.

This would have a 1 barrel carb.

That would explain why they only list a 2 barrel. I've messed with so few GM I6s I forgot about those single castings.

 

[Grit dog]

That would explain why they only list a 2 barrel. I've messed with so few GM I6s I forgot about those single castings.

Same. And I was corrected that only just a few years earlier, the General actually offered a 1bbl carb on a 250 engine.
Guess I should have known that bit of Squarebody geekology, but like you never really saw any/many. The V8 offerings of the day were poor enough in performance that all the trucks I was around or responsible for had V8s.
But this is just another one of those hypothetical discussions for the rest of us that is getting deeper and going down rabbit holes due to an off hand request by the OP to look into out crystal balls and decipher what carb he has and where to find him a new one….I”d take the air cleaner off and look at the carb personally.
But apparently neither he nor his mechanic are able to.