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73-87 Chevy _ GMC Trucks => Performance => Topic started by: Trimmy on December 14, 2012, 01:02:58 pm

Title: Carbs For my 454
Post by: Trimmy on December 14, 2012, 01:02:58 pm

I have an 86 454 and I think its time for a new carb. It has the stock quadrajet on it and I was wondering what I would take to change to a holley or an edelbrock carb?

Title: Re: Carbs For my 454
Post by: blazing816 on December 14, 2012, 01:14:20 pm

With my eldlebrock 1406 all it took really was buying the carb and an adapter plate.....but I do not have a 700r4 so there is no TV cable, just a kick down

Title: Re: Carbs For my 454
Post by: bake74 on December 15, 2012, 08:49:37 am

Quote from: Trimmy on December 14, 2012, 01:02:58 pm

I have an 86 454 and I think its time for a new carb. It has the stock quadrajet on it and I was wondering what I would take to change to a holley or an edelbrock carb?

     You have to check for round bore or square ( or get an adaptor plate as mentioned ), and as blazing816 said you have to get the proper transmission and choke stuff. 
     If you call any speed shop around you they should be able to look up both carb's and tell you their part numbers you need for your truck.

Title: Re: Carbs For my 454
Post by: Captkaos on December 16, 2012, 01:12:30 pm

Why not rebuild the Quadraject?  They are pretty simple and you know it fits.

Title: Re: Carbs For my 454
Post by: Trimmy on December 17, 2012, 03:27:45 pm

How hard is it to set-up after the rebuild? What are some good rebuild kits?

Title: Re: Carbs For my 454
Post by: Captkaos on December 23, 2012, 01:59:28 pm

I get all my rebuild kits from any of the local parts stores.  Once you get it rebuilt it is just a matter of adjusting the idle mixture screws, no more that what would be needed for a new one.

Title: Re: Carbs For my 454
Post by: Trimmy on December 28, 2012, 10:08:42 am

I've read about some brass bushing that need to be replaced on the butterflies how hard is it to drill these without a drill press and without messing them up?

Title: Re: Carbs For my 454
Post by: 454Man on December 28, 2012, 08:57:59 pm

Not hard. There is a drill bit that comes in the kit made for us dyi folk
Copied  From link below
 Complete DIY carburetor bushing installation kit allows you to install bushings on your Rochester Quadrajet primary throttle shafts yourself. This kit works on all carburetors with 5/16" throttle shafts. Kit contains everything you need to correctly do the job yourself.(++ The key to this kit is the specially machined piloted drill that aligns itself with the existing carburetor throttle shaft bore.++) Complete and detailed instructions are included. Easy to do.

 http://quadrajetparts.com/rochester-quadrajet-parts-quadrajet-throttle-shaft-bushing-carburetor-bushing-installation-kit-for-jet-primary-throttle-shaft-516-p-286.html