Carb replacement 1965 GMC 305
 

This will be my first post. carb had been rebuilt when I got the truck, it’s leaking, went to remove the oil pan - seems like someone did some welding by connecting the oil pan to the mouth of the carb. Looking for advice on how to handle. https://uploads.tapatalk-cdn.com/202...88615d49ce.jpg



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Re: Carb replacement 1965 GMC 305
 

https://uploads.tapatalk-cdn.com/202...4d40d877a7.jpg
https://uploads.tapatalk-cdn.com/202...9bea87551d.jpg


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Re: Carb replacement 1965 GMC 305
 

That may be one of the dumbest things I've ever seen. I'd probably get a sanding wheel for my drill or my grinder and just sand that weld aloose a little at a time then try to smooth everything out.

Regardless, it's going to have to get off there.

Re: Carb replacement 1965 GMC 305
 

Don't forget to close the choke so dust can't enter the intake.

Re: Carb replacement 1965 GMC 305
 

I didn't even think of that. Good point!:upyes:

Re: Carb replacement 1965 GMC 305
 

Yep, cosmically dumb!
It would be nice if the pan doesn't make it impossible to remove the carb.

Re: Carb replacement 1965 GMC 305
 

Thank you - with gas there, will need to be extra careful.


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Re: Carb replacement 1965 GMC 305
 

I was blown away when I opened the hood the first time - was waiting for this day to come


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Re: Carb replacement 1965 GMC 305
 

Got the carb off and rebuilt https://uploads.tapatalk-cdn.com/202...385f7d8384.jpg
https://uploads.tapatalk-cdn.com/202...de35dce888.jpg
https://uploads.tapatalk-cdn.com/202...8468761597.jpg
https://uploads.tapatalk-cdn.com/202...f9746f44ab.jpg


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Re: Carb replacement 1965 GMC 305
 

Oooo, dats purty!

You should start a build thread in the build topic. Good pics!

Re: Carb replacement 1965 GMC 305
 

Looks good! A lot of extra work to overcome the doofus welding.

Dumb question (which I think I asked in another thread): With what looks like a single bore master cylinder, is that an auto trans or do later trucks have mechanical clutches.

Re: Carb replacement 1965 GMC 305
 

The master cylinder in the picture is the standard single pot master cylinder. Starting in 64 they went to this master cylinder and a mechanical clutch.

Re: Carb replacement 1965 GMC 305
 

Alaroca,

If you have not thought about this already, you might consider modifying the breather to take a dry paper element vs. the steel wool oil bath? Its super simple, just remove all the top housing with a Dremel tool type cutter, leaving the just the top lid. I did that and she still looks like an oil Bath type cleaner.

I did the 2-barrel swap to a Holley 500CFM carb, so the diameter was different, I made a foundation for the lower pan to rest on. If you need any help, ask away.

Carb replacement 1965 GMC 305
 

Hi Jbgroby,

I thought about that, I would actually prefer it. What I couldn’t find was - how to reroute the oil breather hose that comes in on top of the oil pan


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Re: Carb replacement 1965 GMC 305
 

That oil breather hose that you have is definitely not stock. A 1965 model should have the PCV valves under the valves cover, not a road draft tube. Where is that hose connected to?

Possible the lid of the oil filter is not original as well.