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#1 |
~THE SILVER BULLET~
Join Date: Oct 2002
Location: WYOMING
Posts: 285
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points to HEI
how do i know if i have points type ignition or HEI? also what does it take to convert to HEI? is it just the distributor or do i have to replace everything?
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~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~ |
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#2 |
Registered User
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
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if its the 80' in ur signature , you should already have the HEI.
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2004 Silverado Crewcab (Dark Spiral Gray) |
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#3 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Yup. Just remove the cap. Under the cap you have either points or a module. HEIs have modules.
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#4 |
~THE SILVER BULLET~
Join Date: Oct 2002
Location: WYOMING
Posts: 285
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yes its the 80 in my sig. when did they come out with hei??
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~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~ |
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#5 |
Registered User
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
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I wanna say aroung 73 or 75, not sure but i know the 80's had HEI
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2004 Silverado Crewcab (Dark Spiral Gray) |
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#6 |
Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,550
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HEI year...
HEI's were installed in GM trucks in 1975. It's pretty easy to tell a points distributor from an HEI distributor after you've seen each of them once.
This is HEI: ![]() This is points: ![]() The points distributor will have a smaller cap (about 3 1/2" diameter) with just the wires on top. The HEI distributor has a much larger cap (about 7" diameter) with a plastic cover on top covering the ignition coil (mounted on top of the cap) and a rectangle shaped protusion which normally points towards the brake booster where the wire from the ignition and possibly tach plug in to the distributor cap. Note, there are also small cap HEI distributors which were used on various GM products starting the in the early 90's or maybe late 80's but wouldn't be found stock in a 73-87 truck. If you do have a points distributor, there will be a noticable difference when you swap in an HEI. You need to change some wiring to swap over but it's not too hard. Joe |
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