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.