HEI Internal Coil - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sixpac · 12-30-2005, 10:07 PM

I have an HEI with the external coil on it. I think the coil is distracting and ugly. How much trouble and expense is it to go to an internal coil?
This is on a '66 Chevy 250. I could have used a Pertronix and made it look factory. Almost wished I had, but don't want to throw the money away that I spent on the HEI.

60-66 Nut · 01-04-2006, 02:10 PM

Sixpac, I have an internal HEI dist that I built for my 194 six cylinder, but I can't remember exactly what I used. It's been a few years ago. I know the dist itself was an external coil unit from an integrated head 250, and I'm pretty sure I used a cap, coil and rotor from like a 1980'ish 229 V6. The part I can't remember is the wire harness for the pickup coil and module. I don't remember if the external coil harness worked with the internal coil cap, but I think it did. But even if it does not work, I think the internal harness is the same one they used on all the V8's, so they should be very easy to find. Hope that helps.

60-66 Nut

Fred T · 01-04-2006, 02:19 PM

Cheapest way is to go to the salvage yard and get the dizzy with the internal coil. Around here they run from $20 to $65, depends on the yard. If the body size is the same, I think you can use an internal coil cap on yours. There were two different sizes, some of the external coil bodies were smaller and took a different cap.

12-30-2005, 10:07 PM	#1
sixpac Registered User Join Date: Nov 2005 Location: Newburgh, IN Posts: 46	HEI Internal Coil I have an HEI with the external coil on it. I think the coil is distracting and ugly. How much trouble and expense is it to go to an internal coil? This is on a '66 Chevy 250. I could have used a Pertronix and made it look factory. Almost wished I had, but don't want to throw the money away that I spent on the HEI.

01-04-2006, 02:10 PM	#2
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Re: HEI Internal Coil Sixpac, I have an internal HEI dist that I built for my 194 six cylinder, but I can't remember exactly what I used. It's been a few years ago. I know the dist itself was an external coil unit from an integrated head 250, and I'm pretty sure I used a cap, coil and rotor from like a 1980'ish 229 V6. The part I can't remember is the wire harness for the pickup coil and module. I don't remember if the external coil harness worked with the internal coil cap, but I think it did. But even if it does not work, I think the internal harness is the same one they used on all the V8's, so they should be very easy to find. Hope that helps. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

01-04-2006, 02:19 PM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: HEI Internal Coil Cheapest way is to go to the salvage yard and get the dizzy with the internal coil. Around here they run from $20 to $65, depends on the yard. If the body size is the same, I think you can use an internal coil cap on yours. There were two different sizes, some of the external coil bodies were smaller and took a different cap. __________________ Fred There is no such thing as too much cam...just not enough engine.



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