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#1053166 - 09/01/17 06:24 PM Converting '88 CCC distributor to HEI-Wiring Q  
Joined: Jul 2017
Posts: 5
Diamond Dave Offline
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Diamond Dave  Offline
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Joined: Jul 2017
Posts: 5
Livonia, MI
I have a 1988 MCSS that I plan to de-computerize with a non-CCC Quadrajet and HEI distributor. All of the emissions equipment had been removed from the car before I bought it and the carburetor needs to be rebuilt, badly, so since I'll be messing around anyways, I'd like to clean up the engine bay and simplify tuning and troubleshooting.

My question is how to wire up the new HEI. My car is an '88 so it has an external coil and smaller distributor cap as opposed to the typical "large cap" HEI with internal coil.

As you can see, there's a fairly thick pink and white wire running from the main harness to the coil, and then thinner pink and white wires from the coil to the distributor. Would I simply splice the heavier wires (currently going from main harness to the coil) to a pigtail for the HEI battery/tach wires?

Is there a way to do this without cutting up the harness? I plan to keep all the CCC stuff in case I ever want to go back to stock.

I read the sticky and didn't see this covered.

[Linked Image]

Thanks in advance.

Last edited by Diamond Dave; 09/01/17 06:25 PM.
#1053172 - 09/02/17 03:43 AM Re: Converting '88 CCC distributor to HEI-Wiring Q [Re: Diamond Dave]  
Joined: Dec 1999
Posts: 11,153
86ttop Offline
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86ttop  Offline
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Joined: Dec 1999
Posts: 11,153
Brooksville, Fl
to start with, it's already HEI, why not get the carb repaired, I have the perfect place, www.customrebuiltcarbs.com I've had two E4ME carbs done there and they both were basically bolt on and go, click on my link and give the place a call, the owners name is Phil and he answers the phone and good luck!!



Leo Paugh
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#1053183 - 09/02/17 05:48 PM Re: Converting '88 CCC distributor to HEI-Wiring Q [Re: Diamond Dave]  
Joined: Aug 2007
Posts: 1,710
88ss408 Online content
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88ss408  Online Content
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Joined: Aug 2007
Posts: 1,710
miramichi, NB
See the big pink wire there. That's your power wire that you need to put the the HEI. You need to change the terminal on it. Just crimp a spade on it or get the proper one from summit. Many companies make them.


1988 monte carlo ss 408 sbc 11:1 compression a.f.r.195cc heads accel ignition system comp cams .507/.510 air gap intake 800cfm edelbrock carb th350 trans 3000 stall torque headman headers 3" dual super 40's 3.73:1 limited slip
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1984 monte carlo cs 400,headers,th250c,air gap intake
#1053339 - 09/11/17 02:16 PM Re: Converting '88 CCC distributor to HEI-Wiring Q [Re: Diamond Dave]  
Joined: Jan 2001
Posts: 2,173
DLV555 Offline
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DLV555  Offline
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Joined: Jan 2001
Posts: 2,173
Findlay, OH USA
It's very simple, Yes, just splice those wires from the main harness with a new connector and connect it to the new coil. Summit, Jegs, and Speedway all sell the pigtail connector to make it a quick swap. I think Accel makes the connector. It's pretty cheap. HOWEVER, as Leo said, stick with the computer and the CCC Q-Jet and HEI if you can. For one, you've already got them, and two, they work great. Only heavily modded motors with low idle vacuum really need to ditch the computer.


1987 Monte Carlo SS, 400 SBC, 800 cfm Q-Jet, Edelbrock RPM Q-Jet intake, Howards Big Mama Rattler cam, Flowtech headers, 2.5" dual exhaust, Delta-Flow 40s
1991 GMC Sierra 1500, 355 w/ Edelbrock cam, headers
1973 Mercury Montego MX, BBF 460, AirGap Intake, 800 cfm Q-Jet, Voodoo cam, low ratio C6, 9" 3.25 posi, 3" exhaust, Flowmaster 40s(the wife's)

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