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Old 04-23-2004, 04:15 PM   #1
rambler
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will any old HEI work?

just missed on ebay a members HEI setup...wasnt paying enough attention.. well I found another one.. and wondering if it will work this is a "slightly used olds 455 distributor HEI" said will fit any OLDS V-8.... so will it fit my 72 Chevy stock 350???? thanks for your help...
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Old 04-23-2004, 04:25 PM   #2
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NO .. OLDs HEI WILL ONLY WORK IN OLDs. CADDY HEI WILL ONLY WORK IN CADDYs ECT. WHAT YOU NEED IS AN HEI OUT OF A CHEVROLET (OR GMC). BIG OR SMALL BLOCK ARE THE SAME.
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Old 04-23-2004, 04:32 PM   #3
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Not all Oldsmobiles had a OLDs engine. Some late 70's - early 80s actually had Chevy motors. They did this to cut cost and then went back when they got too many complaints, from the new Olds owners.

With that said, I don't think any 455 distributor will work on a chevy block. Totally different block structure.
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Old 04-23-2004, 06:39 PM   #4
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anyone know what year the chevy hei is not interchangable anymore? Some one told me an hei out of an mid eighties 305 would not work on a 69 350. Is that true?
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Old 04-23-2004, 08:20 PM   #5
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I believe that from 75 thru 80 any V8 Chevy. I am not 100 percent on this it may be from 73 to 80 but as long as it didnt come out of a computer car or truck ur ok.
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Old 04-24-2004, 12:38 AM   #6
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AS LONG AS IT'S A VACUUME ADVANCE DIST. & OUT OF A CHEVY OR GMC............IT'LL WORK. JOHN
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Old 04-24-2004, 10:14 AM   #7
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Glad to see this post, just bought one myself and wondered for sure....

Mine has the vac advance...
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Old 04-26-2004, 11:00 AM   #8
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thanks guys,, now just got to find one.... dont have time to hit the junkyards right now..
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Old 04-26-2004, 01:24 PM   #9
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I HAVE A COUPLE OF REAL NICE ONES. TIGHT BUSHINGS, THE WIREING AND ALL THE MODULATORS LOOK GOOD, COMPLETE WITH CAP, ROTOR & COIL....... $50 + SHIPPING JOHN
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Old 04-27-2004, 05:57 PM   #10
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how much would shipping be to 64040 or to 66211? Thanks
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Old 04-27-2004, 07:33 PM   #11
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as others have stated; most Chev HEI units are interchangeable...The main differences are the advance curve... I feel that the HEI unit weights and springs should be set up for the engine in which it is installed... The best method is to use a facility that has a distributor machine and have them set the advance curve properly for best economy and performance....
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Old 04-27-2004, 08:35 PM   #12
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RAMBLER... LETS SAY $12

GMC JIM ... WHILE I'M SURE THAT THE GM HEI WILL PERFORM BETTER IF THE ADVANCE CURVE IS ADJUSTED, I'VE NEVER SEEN ONE THAT WAS PUT IN A CHEVY MOTOR THAT DIDN'T WORK..... & WORK GREAT WITHOUT ANY MODIFICATIONS . (PROVIDING IT WAS WORKING PROPERLY TO BEGIN WITH) JOHN
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Old 04-27-2004, 09:19 PM   #13
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John.. sure do agree with you that the HEI's will work with most applications....However, many HEI units designed for heavy duty emmisions had an advance curve that would give very poor performance....For example the specs for 1971 GMC/Chev 350 cu.in engine is a total of vacuum and centrifugal advance --20 to 27 degrees @ 2000 engine RPM......
!980 Chev/GMC Lt. Truck (heavy duty Emissions) specifies a total vacuum & centrifugal advance of 8 to 16 dregrees @ 2000 RPM....
.....If this distributor would be installed on a 1971 Chev/GMC 350 eng.. performance and fuel economy would defintley suffer....

GM Manual #SD-100 '1971 - 80 Tuneup Specificationslists the specs as quoted above....Jim
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Old 04-27-2004, 09:30 PM   #14
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looking thru the manual mentioned in above msg....it appears that ; in general, the replacement HEI dist. should come from the same eng. displacement as the engine the unit will be installed in..
In other words; if your engine is 350 cu. in.; then it is better if the HEI unit also came from a 350 cu. in engine........ Jim
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Old 04-27-2004, 09:38 PM   #15
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I'LL BE EXTRA CAREFUL INSTALLING THESE IN THE FUTURE. JOHN
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Old 04-27-2004, 10:06 PM   #16
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I got a brand new HEI with a 50,000 volt coil for $100 shipped off of e baY. Look on there, you will find a lot of new and good stuff there for a lot cheaper than most aftermarket places and not much more than a used one.
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Old 04-27-2004, 10:55 PM   #17
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...... more info on HEI,s in the FAQ section of this board.........
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Old 04-28-2004, 11:00 AM   #18
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Be carefull with Ebay. I bought one for $75 and needless to say it's going to be a core for napa. Damn thing would barely turn. Ok, I'm done.
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Old 04-28-2004, 04:53 PM   #19
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That's interesting........we took the HEI out of my daughter's 79 Malibu after it was wrecked and put it in the 454 in my friend's OLD flatbed truck and it's still running with it 12 years later.
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Old 04-30-2004, 08:56 AM   #20
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The one in my truck now was locked up when i got it - i soaked it pb blaster for a few days then took it apart cleaned it up and now it works like new.
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Old 04-30-2004, 10:46 AM   #21
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AMAZING..... SIMPLY AMAZING JOHN
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Old 04-30-2004, 03:44 PM   #22
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I wouldnt buy used off of e bay, only new ones and from people with 100% positive feedback.
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