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HEI Distributor for 258 |
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Ollie
AMC Addicted Joined: Sep/17/2012 Location: Brandon, MS Status: Offline Points: 2803 |
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Posted: Sep/23/2018 at 5:11pm |
I been searching for a HEI distributor for my 1983 258 build.
Not heard to much good about a CRT Performance. Most of the jeep forums say to buy a reman 250 chevy dissy and change out the gear. Is this the best way to go? will the stock dissy gear fit? Whats all this about a hardened gear will eat up the cam? I was planning on using a 256 Isky cam. I want to keep the valve train stock. Is this the best cam? I love it in my 232. Open to all advice and suggestions. Having AMC Fun, Ollie |
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1966 American Convertible -- "The Rambler"..SOLD
1974 Postal Jeep -- "Rapid Delivery"...SOLD 1969 Rambler 220 post car--"Road Warrior" 1989 Jeep Comanche Pioneer, 4.0L, auto, 2wd |
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ramblin64sw
AMC Nut Joined: May/31/2012 Location: SoCal Status: Offline Points: 274 |
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The 250 distributor works great. Use the gear off an early delco point distributor. I think I had to use a slightly thicker shim. Be sure to check that there is plenty of end clearance between the pump shaft and distributor shaft. You don't want them to be in a bind.
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1287 |
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Oliie... what is the 258 going in? Are you swapping it into the Rambler? The 250 dizzy swap... Isn't that just an 6 cylinder version of an HEI? I would say they are more reliable than the Motorcraft but the Motorcraft TFI upgrade stuff and the Ford 300 Big Cap is totally use-able still. I think the same Isky 256 cam in the 258 will be fine. It will likely shift the RPM band up a little bit and provide some extra torque but for the most part it should behave the same as long as the the engine is in a similar sized vehicle.
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Ollie
AMC Addicted Joined: Sep/17/2012 Location: Brandon, MS Status: Offline Points: 2803 |
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John,
Yes the 258/904 came out of my 83 Concord, going into my 69 Rambler build. Yes the 250 dizzy swap is an HEI upgrade Hope to have the 69 Rambler done for the next Kenosha Homecoming. Having AMC Fun, Ollie |
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1966 American Convertible -- "The Rambler"..SOLD
1974 Postal Jeep -- "Rapid Delivery"...SOLD 1969 Rambler 220 post car--"Road Warrior" 1989 Jeep Comanche Pioneer, 4.0L, auto, 2wd |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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I used an HEI from a chevy pickup with a 250 I6
I used a gear from an AMC V8 from 81 or 82......... the gear fits the GM HEI shaft and is a perfect match for the 258 cam gear. The early AMC V8 distributor gears are wrong size for the HEI. The later V8 used electronic ignition and a smaller shaft, matching the GM I6 HEI You will find those gears being sold to JEEP nuts who also want to convert to HEI - Jeep shops, eBay, whatever, they are technically the later V8 gears, not the GM points distributor gears. You MAY need to grind the shaft flats up the shaft a bit so it won't bottom out in your oil pump and stress the pump. What I mean is that you should install it with NO gasket and make sure the shaft has end play. If it's snug with no end play, pull it back out, use a small angle head grinder and grind the shaft flat part up a ways making the flat part longer up the shaft. Try it again. What happens is that the flat part doesn't always extend up high enough and when you install the distributor when things get good and hot, it ends up pushing down hard on the oil pump because the round part of the shaft hits the oil pump shaft. Once you make sure there's a bit of play, put the gasket back on and that guarantees play. I think I have a post somewhere about putting HEI in the AMC 6s........ what I use, how I had to modify the HEI shaft a bit so it would fit down into the pump properly, etc.
I have a comp cam in my 4.0 and if building a 258 - I'd use the same 4x4 cam in it, too. Love it. It smacks the valves open and closed faster so it's not a quiet cam, and I used H-S roller rockers I bought from Mike Luke in oHIo, love those, too. I've got a ton of torque and can easily accelerate going UP some of our toughest hills around here without downshifting (and no, Iowa is NOT flat - especially where I live!) |
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Ollie
AMC Addicted Joined: Sep/17/2012 Location: Brandon, MS Status: Offline Points: 2803 |
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Hi Bill,
Thanks for your response and as always your advice is always valued. Going to get the Chevy HEI dissy and gears ordered and on hand. I will be getting back with you with a ton of questions and pics. I will search out your posts. I have driven across your state side to side and top to bottom numerous times and there is nothing "flat" about Iowa. Might have even seen a corn field or two.........hehehehehe Wife loves the quilt patterns on the barns!!! Having AMC Fun, Ollie |
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1966 American Convertible -- "The Rambler"..SOLD
1974 Postal Jeep -- "Rapid Delivery"...SOLD 1969 Rambler 220 post car--"Road Warrior" 1989 Jeep Comanche Pioneer, 4.0L, auto, 2wd |
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ramblin64sw
AMC Nut Joined: May/31/2012 Location: SoCal Status: Offline Points: 274 |
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The gear off a 232 point distributor will work as well. It shares the 0.490" shaft diameter. Gear location measured from the block mounting flange was within 0.020".
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5spdwagon
AMC Addicted Joined: Jun/29/2012 Location: Guy ton ga Status: Offline Points: 522 |
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I have one of the 49$ amc Hei from ebay been in the wagon for 10 years
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Real hot rods have 3 pedals
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matty 401
AMC Addicted Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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i did this to my 258 in my 79 Concord made a big differance idles smoother pulls better also now just waiting to update the carb to the 2100 series off a 304
http://www.amceaglesden.com/images/Downloads/MIU.pdf
Edited by matty 401 - Oct/10/2018 at 6:30am |
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1287 |
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Matty... I was going to make a post about this... to get others experience with this upgrade. This is something I need to do in the near future as well too. My car stumbles badly around 35-40mph... I have the 2100 and all the ignition parts purchased already. I just need to rebuild the carb but other than that I am ready to go on these upgrades myself. I don't think this topic has been covered over here as much as on the Jeeper forums but I really think we should start a thread for these particular modifications on this forum.
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