back to my one ton,,,,
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210490
Printed Date: 25 Mar 2026 at 6:02am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: back to my one ton,,,,
Posted By: desertjoe
Subject: back to my one ton,,,,
Date Posted: 23 Mar 2026 at 10:30am
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If I remember correctly,,,I have a 1989 GMC one ton trk with a 454 Automatic and the dreaded TBI. I would like to change the TBI to a 4 barrel carburator and remove all the extra BS that has to be almost perfect for the frigging TBI to run correctly. I'm positive that with so many DIY's on this site ,,,that many have already done this conversion successfully,,,!!! I don't have a manifold yet but do have several Holly carbs from 650 to 1200 CFM. Anyone wanna share some knowledge,,,??? Many Thanks in advance
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Replies:
Posted By: HudCo
Date Posted: 23 Mar 2026 at 10:48am
| you will need to change the fuel pump so you dont over presure all of it and have a fire |
Posted By: desertjoe
Date Posted: 23 Mar 2026 at 1:13pm
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Hey Thanks HudCo,,, Chit,,,and I had just installed a new in tank unit,,,,,, Whoops,,lookin like more work,,,mayhaps an in-line pressure regulator set at ,,,?? |
Posted By: plummerscarin
Date Posted: 23 Mar 2026 at 3:20pm
| Regulator was my thinking, around 5PSI |
Posted By: jaybmiller
Date Posted: 23 Mar 2026 at 3:41pm
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Maybe find a 'donor' truck with 454/carb setup ?? ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: 8070nc
Date Posted: 24 Mar 2026 at 9:07pm
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Ive got a 88 3500 gmc i did all that too. Got a edelbrick aluminun intake and fuel pressure regulator from jegs. Got a stage 2 quadrajet from national carbureator. Put a hei ditributor in it. Its geared 4.56 so i put a 4l80e in it. Now its trouble free and is sweet as sugar ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: 8070nc
Date Posted: 24 Mar 2026 at 9:09pm
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PS. People want to buy it all the time but it not for sale at any price ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |