Carb change from Holley to Edelbrock / 1970 Chrysler 300 / 440 stock

drrock

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Good morning!

I want to change the carb on my 1970 Chrysler 300, 440 stock.
Actually I have a Holley 4160 and want to switch to Edelbrock 600 CFM Perfomer series 1406.
Has anyone here done this before?
I would need a list of all equipment I need to buy to make it work right from the start.
Biggest problem seems to be the cruise control...
Any help is appreciated!

THX!!
 
To go from your OEM factory stock Holley 4160 to another "square bore" 4bbl (as the Edelbrock 1406 or newer AVS2), just remove the old Holley and put the new Edelbrock in its place. As for the throttle linkage/cruise control? Just remove the nut on the inside of the stud where those things attach, remove the stud, and install that whole item on the new carb. Just takes two wrenches to make that happen.

The ONLY real things to change will be a hot wire to the new carb's electric choke. You can remove the existing choke thermostat in the intake manifold, on the rh side, beside the carb. The wire will need to be a "switched HOT" wire, so finding an appropriate location to tap into an existing "switched 'HOT" wire will be necessary. The carb's instructions should address that.

The electric choke wire can be run along-side the existing cowl harness that goes to the distributor, even hidden in it, then making a left turn out of that group of wires, running along the valve cover, to connect with the electric choke thermostat on the carb. If you do it right, only those who know what they're looking at can see it.

Do use the thick OEM-style carb base gasket rather than the thin cardboard gasket that come with these carbs. Should be in the Edelbrock or Holley caralogs. Will have metal bushings in the basekplate stud holes so you don't overtighten the hold-down nuts (which will crack the baseplate of the carb). Snug them down and then recheck their torque after driving a few times (hot/cold cycles).

Enjoy!
CBODY67
 
You will need the 1481 Edelbrock Chrysler adapter to properly hook up your linkage . Here are a few pictures of the Eddy on my 383 with cruise control in my 69 fury for reference . It’s an easy change over .
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Did anybody ever try connecting the original divorced choke spring located in the well in the intake manifold with a manual (i. e. non-electric choke) Edelbrock carburetor?

As far as I know the shaft on top of the Edelbrock where the mechanism connects is shorter than on an original carburetor, and no adapter kit is provided for that. So some ingenuity in fabricating a connecting metal adapter would most likely be involved.

Yet everybody seems to like the electric choke better, anyway. But not only are the electric choke-equipped Eldelbrock carbs more expensive than the manual units; I would also like to keep my car as stock as possible. As an added bonus, the original non-electric spring will adjust itself as actual temperature in the heat riser increases whereas - in theory - the electric choke slowly opens, no matter what the engine temperature is at that given moment. Also no need to connect a new wire that ands at the electric choke.
 
and want to switch to Edelbrock 600 CFM Perfomer series 1406.
Not sure, but 600 CFM seems a little too low for a 440 engine. I must admit though, that I have never changed carbs on any of my cars, so maybe some more experienced members might comment on that.
 
Not sure, but 600 CFM seems a little too low for a 440 engine. I must admit though, that I have never changed carbs on any of my cars, so maybe some more experienced members might comment on that.

I know several guys who run exactly the 600 CFM on a 440 and they´re all satisfied with that. Should be no prob.
 
Your factory Holley is around 600 cfm. You will see no difference. If you were going to rev it up to 6k alot I would say try something more.
 
Not sure, but 600 CFM seems a little too low for a 440 engine.

I'm using the modern Street Demon 625 on my 440 TNT. Outstanding overall performance. WOT is great, but light throttle cruising, idle, and cold-start after two weeks of sitting are even greater features to enjoy. 625 is plenty of carb for our heavy, 3.23-geared, 5000 rpm C-Bods.
 
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I'm using the modern Street Demon 625 on my 440 TNT. Outstanding overall performance. WOT is great, but light throttle cruising, idle, and cold-start after two weeks of sitting is are even greater features to enjoy. 625 is plenty of carb for our heavy, 3.23-geared, 5000 rpm C-Bods.
I'm running the 750 on mine; works great.
 
a 750 vacuum Edelbrock is my preferred carb on 440 powered C-bodies.

Good gas mileage and enough power. Use it on my SFGT and a bunch of other C-bodies. And my cars see higher RPMs and kickdowns:steering:

Carsten
 
Running the 1406 on my 70-300 and very satisfied with it's performance. Trying the new AVSII out on the 76 RMB with a 400 later this month.
 
Did anybody ever try connecting the original divorced choke spring located in the well in the intake manifold with a manual (i. e. non-electric choke) Edelbrock carburetor?

As far as I know the shaft on top of the Edelbrock where the mechanism connects is shorter than on an original carburetor, and no adapter kit is provided for that. So some ingenuity in fabricating a connecting metal adapter would most likely be involved.

Yet everybody seems to like the electric choke better, anyway. But not only are the electric choke-equipped Eldelbrock carbs more expensive than the manual units; I would also like to keep my car as stock as possible. As an added bonus, the original non-electric spring will adjust itself as actual temperature in the heat riser increases whereas - in theory - the electric choke slowly opens, no matter what the engine temperature is at that given moment. Also no need to connect a new wire that ands at the electric choke.

Your proposed use of adapting the divorced choke linkage to the manual choke carb might work. Would depend upon the geometry and placement of the items being interfaced. Remove the existing choke rod and form-up another rod to do the adaptation, maybe a bent-up coat hanger wire to prototype it?

Agreed, the electric choke opens at a fixed rate, no mater what, every time. But they still might need a tweaked adjustment to come off as needed, by observation. At one time, Holley had a "thermistor" that served to ground the electric choke coil, on the two-terminal coils. It attached to an intake manifold bolt, to modulate the current flow through the coil, to allow for engine temp in how quick the electric choke worked. Similarly, it might prevent over-choking a warmer engine in cold weather.
I understand the theory of operation, but it made no difference in our N TX climate.

I understand the desire for originality, as produced, but this can be a judgment call. Is a carb with a "different linkage" on its rh side less or more OEM looking than a blatant electric choke mechanism? Either way, the appearance would indicate that something has been changed.

If you try and succeed with the manual choke/divorced choke thermostat interface, please keep us posted, with pictures.

CBODY67
 
1406 here on my stock 440. Works great. I thought it to be small for a 440 too when I bought the car. Did some research and found the carb to start to become a restriction at 6300 rpms and up. I never go there so I was relieved. When I have my 440 stroker built I will run a 750 Edelbrock and will buy it from the guy that just bought a carburetor shop here on this forum. His name escapes me at the moment but he runs his rebuilt carbs on an in house engine and will build to suite your needs.
 
1406 here on my stock 440. Works great. I thought it to be small for a 440 too when I bought the car. Did some research and found the carb to start to become a restriction at 6300 rpms and up. I never go there so I was relieved. When I have my 440 stroker built I will run a 750 Edelbrock and will buy it from the guy that just bought a carburetor shop here on this forum. His name escapes me at the moment but he runs his rebuilt carbs on an in house engine and will build to suite your needs.

His name is Dave (user name Dana) and he does excellent work. He just redid an original carb for my GT and it's a piece of art.
Hell, I hate to even put gas through it. :rolleyes:
 
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