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| | | Forums66 Topics128,031 Posts1,055,435 Members48,422 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Apr 2008 Posts: 239 'Bolter | | 'Bolter Joined: Apr 2008 Posts: 239 | I have a 235 with single carb, Fenton dual exhaust and Mallory ignition. I want to install dual Carter-Weber carbs. The Mallory does not have a vacuum advance. Considering replacing the Mallory ignition with HEI ignition. My original distributor is long gone. Was told the HEI will respond better as a daily driver. Looking for some input on the distributor ignition.
| | | | | Joined: Apr 2012 Posts: 124 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 124 | I recently put an hei distributor on my 250. I had an awful intermittent miss and was thinking that I made a mistake buying a $65.00 Chinese distributor off ebay. I finally found a loose wire on the distributor (my own fault). Now the motor runs better than it has since I got it. The points kept fouling on the old distributor is why I changed it. I am not sure if it would be an upgrade for your Mallory or not.I was replacing a wore out distributor.
Gene 1959 Apache
| | | | | Joined: Sep 2011 Posts: 1,451 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,451 | Larry, i ran an old dual point Mallory for several years, should have swaped it out for HEI sooner! Got one From Tom @ Stovebolt, used a set of NAPA Blue max wires for a later Ford 300 six. It was at least the 2nd best upgrade I've done for driveablility, right up there w/ T5 swap. '60 C10 235 / T5 & 3.56 spicer power loc
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022 | | | | | Joined: Oct 2007 Posts: 725 Shop Shark | | Shop Shark Joined: Oct 2007 Posts: 725 | See the TECH TIPS here on the 'Bolt for a good "How-To" on using an HEI on a 235 or 261. Remember to run a 10ga power lead from an always on switched power source.
I have bought HEIs on ebay and on the inside of the casting they say "Holden" which is GM in Australia. There may be some Chinese ones there, but I have never gotten one. All the "ebay" ones seem to have to much vacuum advance. I have had to replace the vacuum can with a 10 degree can from a V-8 "High Performance Kit" from the flaps. ALL the HP parts that fit the V-8 version work on the L6 version except the cap and shaft! Have fun, guys!
Best wishes,
Les | | | | | Joined: Apr 2008 Posts: 239 'Bolter | | 'Bolter Joined: Apr 2008 Posts: 239 | Talked with Tom Langdon yesterday. The carbs and HEI distributor are ordered. | | |
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