edelbrock 1405 on factory 4 brl manifold - The 1947 - Present Chevrolet & GMC Truck Message Board Network

trapperjack · 12-15-2010, 07:35 PM

PO, put in a refreshed 75 350 from a sub. in the 67 3/4 ton 4x4 to replace a worn out 283. Used the factory quadra-jet, which happens to have an electric choke, and is not hooked up. I have a rebuilt 1405 i was going to put on the 68 panel, but am thinking about using it on the pick up. Wil the edelbrock 1405 work ok on the factory 4 barrel manifold from 75? The truck has sat since easter. The 1405 was rebuilt, then never installed a couple of years ago. what do ya'll think?

swamp rat · 12-15-2010, 08:23 PM

The Quadrajet has a spread bore, the Edelbrock is a squair bore, that means the secondarys are larger on the Q-jet than the primarys where the primarys and secondarys on the Edelbrock are the samer size.

There may be an adapter avalable but i have never had the need to look for one, i just swapped intake manafolds

trapperjack · 12-15-2010, 08:35 PM

I have a used edelbrock performer, too, just had plans for that and the 1405 on the panel. What would be needed to hook up the electric choke, or change it out on the quadrajet? It ran fine, just cold natured at start-up (duh) with no choke.
So I'm told by PO

trapperjack · 08-10-2011, 11:53 PM

looking for more thoughts on this. I put the 1405 on my son's F100 to get it started. Looks to be new, not remanned. Fired the ford 302 right off, idles smooth. Question is, will it do good on a 350 with a factory 4 barrel manifold? Looking for thoughts, as I'm ready to get the 67 tagged and working for a living. The quadra jet that's on there seems to be from a 454, which explains why it' smells like it's running rich. Runs great, idles smooth, great throttle response, just def. running rich.
Discuss.

webfoot · 08-11-2011, 11:02 AM

That is a 600 cfm carb which should do fine on a 350. As mentioned above you will need a spread bore to square bore adapter which should be available at most auto parts stores.

406 Q-ship · 08-11-2011, 11:51 AM

You will need to either change the intake to a manifold that has the square pattern or get an adapter. A 2101 Performer will work, and there are plenty of companies that make adapters (trans dapt, Mr Gasket, Edelbrock). The electric chock just needs to get 12 volts power only when the ignition is on.

I just thought of something........are you using the stock manifold off the 283 or the EGR intake off the 1975 350? If it is the 75 350 Intake with an EGR the 1405 carb will NOT clear the EGR hold down bracket and you will have to change intakes.

s102000 · 08-11-2011, 12:52 PM

Autozone has the adapter for the quad intake around 25 bucks...I have one on my 69 gmc that has a 76 car 350 in it...

ChevLoRay · 08-11-2011, 01:04 PM

I gave one away....

MagmaJct · 08-11-2011, 01:46 PM

The 350 in my `71 has the stock manifold with the 1405 (with electric choke add-on). It was there from the PO and it has the adapter which works well. I eventually added an insulator spacer to keep the carb from overheating.

I'll eventually install a Q-Jet to improve mileage.

Ackattack · 08-11-2011, 01:57 PM

1405 on my 350 with stock intake. Works fine.

As mentioned, just run a key on 12V supply to the choke wire.

406 Q-ship · 08-11-2011, 05:35 PM

Quote:

Originally Posted by Ackattack

1405 on my 350 with stock intake. Works fine.

As mentioned, just run a key on 12V supply to the choke wire.

It will not fit on a stock cast iron spread bore intake. The hole pattern is completely different for the Edel/Carter/Holley square bore pattern than the Q-jet/ThermoQuad. You either have a aluminum intake for a holley carb (like a 350 hp /327 or a LT-1 Z/28 Corvette) to be able to run a 1405 without an adapter.

Hubscrub · 08-11-2011, 06:46 PM

i would just hook up the choke just needs a 12volt wire that hot with the key on. i would rather have a q-jet anyday than any other carb i buy all i can find. If you have to use the edelbrock (not a bad carb) you can get an adapter no problem

**Already Gone** · 08-11-2011, 10:51 PM

I have an Edelbrock 1406 ( same as 1405 carb just auto choke) on the stock intake on my 396 and it works perfectly.

trapperjack · 08-11-2011, 11:57 PM

guess I could rejet the quadrajet, i'm told form the numbers on the carb that it was for a 454, and it smells rich. I don't have good luck working on carbs. Rebuilt a holley 4 barrel one time, caught it on fire.

I really wanted the edelbrock intake and carb for the 68 panel to replace the 2 barrell. Thanks for all the input.

Ackattack · 08-12-2011, 08:09 AM

Quote:

Originally Posted by 406 Q-ship

It will not fit on a stock cast iron spread bore intake. The hole pattern is completely different for the Edel/Carter/Holley square bore pattern than the Q-jet/ThermoQuad. You either have a aluminum intake for a holley carb (like a 350 hp /327 or a LT-1 Z/28 Corvette) to be able to run a 1405 without an adapter.

Oh, forgot to mention that I haven an adapter

12-15-2010, 07:35 PM	#1
trapperjack Registered User Join Date: Nov 2006 Location: The Republic of Texas Posts: 361	edelbrock 1405 on factory 4 brl manifold PO, put in a refreshed 75 350 from a sub. in the 67 3/4 ton 4x4 to replace a worn out 283. Used the factory quadra-jet, which happens to have an electric choke, and is not hooked up. I have a rebuilt 1405 i was going to put on the 68 panel, but am thinking about using it on the pick up. Wil the edelbrock 1405 work ok on the factory 4 barrel manifold from 75? The truck has sat since easter. The 1405 was rebuilt, then never installed a couple of years ago. what do ya'll think? __________________ 1962 Chevy K10 factory 4x4 stepside longbed http://67-72chevytrucks.com/vboard/s...d.php?t=494632 1967 Chevy 3/4 ton 4x4 long bed (Henrietta) traded 1968 Chevy 1/2 ton panel wagon, V8 and powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=483345 1978 Ford F250, beater stepside 2008 Jeep Wrangler 4 Door 2010 Chevy 4x4 plain jane work truck

12-15-2010, 08:23 PM	#2
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: edelbrock 1405 on factory 4 brl manifold The Quadrajet has a spread bore, the Edelbrock is a squair bore, that means the secondarys are larger on the Q-jet than the primarys where the primarys and secondarys on the Edelbrock are the samer size. There may be an adapter avalable but i have never had the need to look for one, i just swapped intake manafolds __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's

12-15-2010, 08:35 PM	#3
trapperjack Registered User Join Date: Nov 2006 Location: The Republic of Texas Posts: 361	Re: edelbrock 1405 on factory 4 brl manifold I have a used edelbrock performer, too, just had plans for that and the 1405 on the panel. What would be needed to hook up the electric choke, or change it out on the quadrajet? It ran fine, just cold natured at start-up (duh) with no choke. So I'm told by PO __________________ 1962 Chevy K10 factory 4x4 stepside longbed http://67-72chevytrucks.com/vboard/s...d.php?t=494632 1967 Chevy 3/4 ton 4x4 long bed (Henrietta) traded 1968 Chevy 1/2 ton panel wagon, V8 and powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=483345 1978 Ford F250, beater stepside 2008 Jeep Wrangler 4 Door 2010 Chevy 4x4 plain jane work truck

08-10-2011, 11:53 PM	#4
trapperjack Registered User Join Date: Nov 2006 Location: The Republic of Texas Posts: 361	Re: edelbrock 1405 on factory 4 brl manifold looking for more thoughts on this. I put the 1405 on my son's F100 to get it started. Looks to be new, not remanned. Fired the ford 302 right off, idles smooth. Question is, will it do good on a 350 with a factory 4 barrel manifold? Looking for thoughts, as I'm ready to get the 67 tagged and working for a living. The quadra jet that's on there seems to be from a 454, which explains why it' smells like it's running rich. Runs great, idles smooth, great throttle response, just def. running rich. Discuss. __________________ 1962 Chevy K10 factory 4x4 stepside longbed http://67-72chevytrucks.com/vboard/s...d.php?t=494632 1967 Chevy 3/4 ton 4x4 long bed (Henrietta) traded 1968 Chevy 1/2 ton panel wagon, V8 and powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=483345 1978 Ford F250, beater stepside 2008 Jeep Wrangler 4 Door 2010 Chevy 4x4 plain jane work truck

08-11-2011, 11:02 AM	#5
webfoot Registered User Join Date: Nov 2007 Location: Hermiston, OR Posts: 947	Re: edelbrock 1405 on factory 4 brl manifold That is a 600 cfm carb which should do fine on a 350. As mentioned above you will need a spread bore to square bore adapter which should be available at most auto parts stores. __________________ *Running in place gets you nowhere fast.* -me 1968 GTO 4-spd covnvertible 1970 K-20 4-speed, factory AC.

08-11-2011, 11:51 AM	#6
406 Q-ship Registered User Join Date: Oct 2010 Location: Largo Florida Posts: 632	Re: edelbrock 1405 on factory 4 brl manifold You will need to either change the intake to a manifold that has the square pattern or get an adapter. A 2101 Performer will work, and there are plenty of companies that make adapters (trans dapt, Mr Gasket, Edelbrock). The electric chock just needs to get 12 volts power only when the ignition is on. I just thought of something........are you using the stock manifold off the 283 or the EGR intake off the 1975 350? If it is the 75 350 Intake with an EGR the 1405 carb will NOT clear the EGR hold down bracket and you will have to change intakes. __________________ Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle."

08-11-2011, 12:52 PM	#7
s102000 Registered User Join Date: Jan 2009 Location: Rockmart, Ga Posts: 27	Re: edelbrock 1405 on factory 4 brl manifold Autozone has the adapter for the quad intake around 25 bucks...I have one on my 69 gmc that has a 76 car 350 in it...

08-11-2011, 01:04 PM	#8
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: edelbrock 1405 on factory 4 brl manifold I gave one away.... __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

08-11-2011, 01:46 PM	#9
MagmaJct Registered User Join Date: May 2008 Location: Mesa, AZ Posts: 281	Re: edelbrock 1405 on factory 4 brl manifold The 350 in my `71 has the stock manifold with the 1405 (with electric choke add-on). It was there from the PO and it has the adapter which works well. I eventually added an insulator spacer to keep the carb from overheating. I'll eventually install a Q-Jet to improve mileage. __________________ I own 3 classic vehicles. 1971 LWB C10 Deluxe. 1974 VW Super Beetle. 1971 VW Fastback. The C10 and the Super Beetle run, the Fastback is just not there yet! Please visit my Super Beetle and Fastback profile on TheSamba.

08-11-2011, 01:57 PM	#10
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: edelbrock 1405 on factory 4 brl manifold 1405 on my 350 with stock intake. Works fine. As mentioned, just run a key on 12V supply to the choke wire. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

08-11-2011, 06:46 PM	#12
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: edelbrock 1405 on factory 4 brl manifold i would just hook up the choke just needs a 12volt wire that hot with the key on. i would rather have a q-jet anyday than any other carb i buy all i can find. If you have to use the edelbrock (not a bad carb) you can get an adapter no problem __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14

08-11-2011, 10:51 PM	#13
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,105	Re: edelbrock 1405 on factory 4 brl manifold I have an Edelbrock 1406 ( same as 1405 carb just auto choke) on the stock intake on my 396 and it works perfectly. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

08-11-2011, 11:57 PM	#14
trapperjack Registered User Join Date: Nov 2006 Location: The Republic of Texas Posts: 361	Re: edelbrock 1405 on factory 4 brl manifold guess I could rejet the quadrajet, i'm told form the numbers on the carb that it was for a 454, and it smells rich. I don't have good luck working on carbs. Rebuilt a holley 4 barrel one time, caught it on fire. I really wanted the edelbrock intake and carb for the 68 panel to replace the 2 barrell. Thanks for all the input. __________________ 1962 Chevy K10 factory 4x4 stepside longbed http://67-72chevytrucks.com/vboard/s...d.php?t=494632 1967 Chevy 3/4 ton 4x4 long bed (Henrietta) traded 1968 Chevy 1/2 ton panel wagon, V8 and powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=483345 1978 Ford F250, beater stepside 2008 Jeep Wrangler 4 Door 2010 Chevy 4x4 plain jane work truck



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