460 swap almost done
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Mountain Pass
Joined: Jul 2000
Posts: 189
Likes: 12
From: Minnesota
460 swap almost done
Hi all, I have a couple questions I need help on. First of all I have almost completed swapping a 460 into my 76 F150 4x4. My qustions are about hooking up my electric choke and vaccum lines. I have a Holley 750 cfm with vaccum secondaries and electric choke. I pulled a electric choke wire off of a truck with a 460 in it. My question is one of the wires went to the choke and one went to this round housing on the other side of the carb. My Holley has two plug in tabs located on the choke housing labeled pos and neg. Does anyone know which of these wire goes to the pos and which one goes to the neg? Also, where does the vaccum line for the timing advance hook up? Does it hook to the carb and if so which vaccum port, the one on the top front of the carb housing or the one on the bottom front of the housing? Both vaccum ports are on the front of the carb. Or does it hook up to the manifold vaccum port? Any help would be appreciated and thanks in advance.
Posting Guru
Joined: Mar 2001
Posts: 1,494
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460 swap almost done
To the best of my knowledge, the vacuum advance is a ported vacuum siganl off the carb. Test the vacuum on the ports of your carb and decide which draws air at the right load. On my pinner single barrel, all the ports are the same - no matter WOT or a little above idle.
Moderator
Joined: Jan 2001
Posts: 57,025
Likes: 2,756
From: Virginia
460 swap almost done
Most Fords I've messed with run the vacuum advance line to the ported vacuum source. This will probably be the port on the carb that is higher up. If the idle is set correctly, there will be no vacuum on this port until the throttle is opened a little. Ford also usually hooked the electric choke to the stator terminal on the alternator. This keeps the choke from pulling off if the engine is not running-but somebody has the key on. I would imagine the neg goes to a ground somewhere (like the carb housing you described) and the pos can go to the stator or a 12v key on source.
Postmaster
Joined: Feb 2000
Posts: 2,759
Likes: 2
From: Auburn,Al
460 swap almost done
the negetive terminal is just a ground, ground it to one of the carb studs or sumthin, the positive goes to a power source that only works with the ignition on....which would be the wire u got
1985 F-150/351Ho/4wd
1979 f-250 429(stout 460 on the way)/4spd/6in w/36's,Dana60/44hd,3.54 gears~4.11's comin soon
on a quiet night your can hear a chevy (lol,you can watch a dodge) rusting away
1985 F-150/351Ho/4wd
1979 f-250 429(stout 460 on the way)/4spd/6in w/36's,Dana60/44hd,3.54 gears~4.11's comin soon
on a quiet night your can hear a chevy (lol,you can watch a dodge) rusting away
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