250 carb choice opinions 2bbl vs 4bbl - The 1947 - Present Chevrolet & GMC Truck Message Board Network

walls · 10-29-2016, 09:59 AM

I have a stock rebuilt 68' 250 installed in my 63' pickup.
S10 t5, 3.73 rear, HEI distributor
About to install Langdon cast iron headers and a Clifford water heated intake.

I think I've narrowed my carb selection down to a Weber 38/38 2bbl or Holley 390 4bbl.

This is just a cruiser, I won't be shifting at 5000rpm.
Got OD for the highway.
Just looking for response off the line and to not run out of steam at highway speeds 60-70mph

Purchase price is negligible.
I'll need an adapter plate and a throttle cable for both.

Thoughts??

**slepysal** · 10-29-2016, 12:21 PM

I am running 350cfm 2bbl Holley on top of my Cliford. It came off of a Mustang .

TJ's Chevy · 10-29-2016, 05:16 PM

Do the weber, will be a pain in the butt to tune. But once it is you'll get better mileage and it'll make a nice power increase. Holley is good for flooding engines out. lol Nasal leakage is their best.

chevy_mike · 10-29-2016, 11:19 PM

Have a Holly 390 on my 250 in my wagon, on a Clifford intake and headers, for the last 4 years with zero issues. Starts no problem and the choke works great. Plenty of power to cruise at 65 and will still hit it to over 100.

62 Barnfind · 10-30-2016, 10:07 AM

Quote:

Originally Posted by TJ's Chevy

Do the weber, will be a pain in the butt to tune. But once it is you'll get better mileage and it'll make a nice power increase. Holley is good for flooding engines out. lol Nasal leakage is their best.

I agree! Once you get them right they are ok.

walls · 10-31-2016, 03:13 PM

I decided on the Weber 38/38.
Found a company on eBay advertising a kit for a jeep 258.
I called them and told them my info, they said they would rejet for my application.
They're also sending along a DVD for tuning the carb. $260.
Seems like a good deal.
I'll post results once up and running.

TJ's Chevy · 10-31-2016, 03:16 PM

Yup, much better than a Holley 390 price. They used to be around $320 and now are well over $450. What a rip off.

txinliner · 11-06-2016, 11:26 AM

I run a 390 holley with a offenhauser and hei it runs fantastic the only thing is it took a little tuning certainly a learning curve.another option is a edelbrock 500

10-29-2016, 09:59 AM	#1
walls Registered User Join Date: Aug 2011 Location: Green Lane PA Posts: 55	250 carb choice opinions 2bbl vs 4bbl I have a stock rebuilt 68' 250 installed in my 63' pickup. S10 t5, 3.73 rear, HEI distributor About to install Langdon cast iron headers and a Clifford water heated intake. I think I've narrowed my carb selection down to a Weber 38/38 2bbl or Holley 390 4bbl. This is just a cruiser, I won't be shifting at 5000rpm. Got OD for the highway. Just looking for response off the line and to not run out of steam at highway speeds 60-70mph Purchase price is negligible. I'll need an adapter plate and a throttle cable for both. Thoughts??

10-29-2016, 12:21 PM	#2
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: 250 carb choice opinions 2bbl vs 4bbl I am running 350cfm 2bbl Holley on top of my Cliford. It came off of a Mustang . __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

10-29-2016, 05:16 PM	#3
TJ's Chevy Registered User Join Date: Mar 2013 Location: Southern Oregon Posts: 10,384	Re: 250 carb choice opinions 2bbl vs 4bbl Do the weber, will be a pain in the butt to tune. But once it is you'll get better mileage and it'll make a nice power increase. Holley is good for flooding engines out. lol Nasal leakage is their best. __________________ 1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw

10-29-2016, 11:19 PM	#4
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: 250 carb choice opinions 2bbl vs 4bbl Have a Holly 390 on my 250 in my wagon, on a Clifford intake and headers, for the last 4 years with zero issues. Starts no problem and the choke works great. Plenty of power to cruise at 65 and will still hit it to over 100. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...

10-31-2016, 03:13 PM	#6
walls Registered User Join Date: Aug 2011 Location: Green Lane PA Posts: 55	Re: 250 carb choice opinions 2bbl vs 4bbl I decided on the Weber 38/38. Found a company on eBay advertising a kit for a jeep 258. I called them and told them my info, they said they would rejet for my application. They're also sending along a DVD for tuning the carb. $260. Seems like a good deal. I'll post results once up and running.

10-31-2016, 03:16 PM	#7
TJ's Chevy Registered User Join Date: Mar 2013 Location: Southern Oregon Posts: 10,384	Re: 250 carb choice opinions 2bbl vs 4bbl Yup, much better than a Holley 390 price. They used to be around $320 and now are well over $450. What a rip off. __________________ 1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw

11-06-2016, 11:26 AM	#8
txinliner Registered User Join Date: May 2008 Location: tyler texas Posts: 94	Re: 250 carb choice opinions 2bbl vs 4bbl I run a 390 holley with a offenhauser and hei it runs fantastic the only thing is it took a little tuning certainly a learning curve.another option is a edelbrock 500 __________________ 65c10 43,000 original miles ,230 stovebolt,powerglide,3" drop spidles 3" drop springs w/ half coil cut and 5 drop springs in back with 1 1/2 blocks... c notch soon to add hei offy 4 v intake and holley 390



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