1967 gmc
Hi guys I have a 1967 gmc 3/4 ton long bed with the 305e and a th400, truck has power steering, power brakes and factory ac. I was just courious to see if the truck is rare at all?
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Re: 1967 gmc
Welcome Dbrown1992;
Sounds like a nicely optioned truck; does it have the small back window? Also curious if it has the support rods from the oil pan to the transmission? How about some photos to share? |
Re: 1967 gmc
I don't have any exact figures, but to give you a rough idea the 305E was probably the most common engine in '67 2500's. The Turbo 400 would be less common than a manual transmission, but many were built. Power steering and brakes make the truck a little more rare, but factory A/C in a '67 isn't too common. Is the truck a Custom? Does it have body side moldings and a large rear window? Chrome bumpers and grille?
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Re: 1967 gmc
Though the 305E may have been the most common in 67, there are not that many around today. As usual many haved been Chivied with that ubiquitous small block V8. In 67 for the first time there was a large mix of Chevrolet engines in GMC Trucks such as the 230,250 & 292 inline sixes and 283,327 & 396 V8's along with GMC's 305E and 351E V6 engines. I would consider 1967-69 V6 powered pickup as rare today, it was the last of the breed of real GMC pickups.:thumbsup:
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Re: 1967 gmc
Funky61, it does have the small window, chrome front bumper and chrome side molding, we just recently picked up a good running 1965 305 motor and 4 speed with a Holley carb and Petronix ignition
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Re: 1967 gmc
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That being said, I do agree that your truck with that combination of options is pretty rare and well worth hanging onto. I see you're only about 180 miles north of me. If you ever get down this way, let me know when you're coming. |
Re: 1967 gmc
Whatever you do...please leave it stock!
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Re: 1967 gmc
So I had a few questions about this truck, I put a Holley 500 on it and it uses a different air filter housing and there is a breather tube that was attached to the cover can I move it? And also does this truck have a crankcase breather filter in it?
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Re: 1967 gmc
Usually, if there is a breather pipe to the air cleaner, the engine does not have a breather filter. The breather filter would be in a small can behind the left cylinder head.
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Re: 1967 gmc
So can I block that hose if I run a breather on the valve cover?
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Re: 1967 gmc
Should be O.K.. The PCV valves are under the valve covers, so you have to allow fresh air into the crankcase. Most V-6's have the can with the small filter in it behind the left head. On California 'closed' systems, the can was replaced with a pipe to the air cleaner. Later on (about '68 and up) the hole where the can or pipe attached was blocked off with a freeze plug and a breather was added to one of the valve covers, usually with a hose to the air cleaner. The filter in the can, pipe to the air cleaner, and breather on the valve cover all do the same thing: they let air into the crankcase.
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On mine all I have is a breather on the cover. Works fine.
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Re: 1967 gmc
What I would do is update the system to a 62 305D where one PCV valve was used that ran in back from the carburetor to the rear filter and eliminate the road draft tube.
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Peter, what year did they start putting the PCV valves in the heads? |
Re: 1967 gmc
I would say it was 1963 with the introduction of the 305E, I know the biggest difference between the 305D vs the 305E was the emissions equipment.
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Re: 1967 gmc
I can't see why they wouldn't have. Replacing a 305 in a pickup to a larger 351C upon request from a dealer was not to uncommon during that era. GMC did promote repowering all brands of trucks with their V6 engines including their own older trucks, dealers were set up to do conversions.
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Re: 1967 gmc
Could I plug that hose if I run a breather on the valve cover?
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Re: 1967 gmc
Your 67 has a closed positive ventilation system, plugging the hose is not a good idea you may build up too much pressure in the crancase system and the valve cover breather without a tube that runs to the air cleaner will not be adequate. It's not that difficult to come up with an attachment to the air cleaner. My 68 does not have the tube that runs from the back breather, I use a K&N open air cleaner setup but I have retained the factory ventilation system which uses a breather cap with tube to the air cleaner, modifcations were relatively simple:upyes: I will post a pic of the setup in another post.
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Re: 1967 gmc
Guess I need to fix mine. lol Been running just an oil breather and that's about it.
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Re: 1967 gmc
What you can do is update it to the 68-74 style valve cover breather with tube, eliminate the rear breather/filter and just cap it off with an expansion plug. I'll post a pic of my 68 setup tomorrow when I get home.:ok:
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Re: 1967 gmc
What type of motor oil do you guys like in the 305?
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Re: 1967 gmc
I too am running 15W-40 in my 478M but using Rotella oil which already has zinc in it:thumbsup:
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Re: 1967 gmc
30w Valvoline Racing. Lots of zinc.
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As to the reply I promised on the breather cap used on 68-74, this is the basic setup GMC used in those years with the exception of the K&N air cleaner.:ok:
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Re: 1967 gmc
I'm jealous of the chrome valve covers and HEI. No fair. lol! I have the same style breather on mine...just doesn't have the port like that one does.
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Re: 1967 gmc
It's not a 305 either!:poke:
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Re: 1967 gmc
I have a 305 v6 e and 4 speed transmission that came out of a 1967 gmc. Looking to sell it. 1000 for all or best offer. If interested call or text me at 9792045927. I'm located in bryan tx
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