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Technical 305 V6

Discussion in 'Traditional Hot Rods' started by george.barnes.754, Jun 30, 2018.

  1. So I sent my 292 Chevy to the machinenshop a couple months ago. Went by there a week or so ago and low and behold my engine wasn't there. Seems the shop git it dine and never bothered to call me and sold it for the bill. The shop owner is making it right as it happened while he was on vacation. A buddy of mine abd me was talking the other bight which led us to walking out to the barn to his 49 or 50 model GMC pickup and the running GMC 305 V6 in it. He's doing a V8 swap in it and gave me the motor. So I have a complete, running, motor, with a truck 3 speed. And I have an M22 Muncie left over from my days of playin with muscle cars. Will it hook up? Also, my 27 T has a 37 or 38 Banjo rear in it. Think it'll live happily behind it? The car is a cruiser, and those motors only made like 125hp. I am going to build a set of sprint style headers and put a 500cfm Holley 2bbl on on it and a modified Buick HEI so power should go up a hair.

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  2. jimmy six
    Joined: Mar 21, 2006
    Posts: 16,668

    jimmy six
    ALLIANCE MEMBER

    5-8 mpg with GMC 305 V6. Move a house with it but can't a gas station.
     
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  3. I was also curious aboit trying to put a T5 behind it to help that out a little...

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  4. Crosley
    Joined: Mar 3, 2001
    Posts: 1,126

    Crosley
    Member
    from Aridzona

    Last year: I read comments somewhere about a T-5 behind a 351 GMC V6... Something about the clutch disc center. They took the center out and turned it around becasue of the clearance needed on the flywheel of the GMC engine. He was happy with the results
     
  5. My 69 had three gas tanks....I kept one full and used it often when I ran out with the main tank. Only used the third tank on trips. Full or empty it got under 10 mpg.......If you do use one, DO NOT let it get hot or overheated....the heads WILL crack......
     
  6. Any chance of having a link to it? A search for 351 V6 to T5 brought up nothing

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  7. Going to replace the water pump from the get go. It leaks a little bit, and run a flex fan as a puller and an electric fan as a pusher, along with the lowest temp thermostat I can lay my paws on. Probably a failsafe so if it sticks it sticks open.

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  8. treb11
    Joined: Jan 21, 2006
    Posts: 4,104

    treb11
    ALLIANCE MEMBER

    Just wait for the machine shop to get you a useful engine. Who / where were they? You're in Texas, IIRC.
     
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  9. Id rather not say. He does more industrial/ag stuff than hot rod motors. And ge is goin to make right. I was $25 into that motor, he's goin to fo the work on a 292 Y block I also have sittin here as a repayment, so we'll see how it goes.

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  10. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    Don’t know where you are located, but I will give you two rebuildable 292 cores if you will come get ‘em. I need the space. You get first refusal, but if you don’t want them, next person who responds can have them.

    PM me with responses. I want them gone soon.


    Ray
     
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  11. IL is a good little haul from TX

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  12. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,038

    Johnny Gee
    Member
    from Downey, Ca

    ^^^^^ Think of the gas you'll save? Not to mention time modifying things.
     
  13. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    Depends on where you are in a Texas and what value you place on the engine cores........I have driven to and from many times....but Texas IS a big State......however, I understand and am NOT pressuring anyone.....just made an offer.

    Perhaps one of my fellow Inliners International members will see this thread.

    Ray
     
    Last edited: Jun 30, 2018
  14. I do appreciate it though. Im in the panhandle. Still a 2 or 3 day drive.

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  15. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    Yep......got it.....that is a long haul.....:confused:

    Ray
     
  16. Not much modifying to do. New motor mounts, new trans mount add a clutch pedal (which honestly I wanted a standard anyways). Same radiator, had to build headers either way, carb goes in with an adaptor.

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  17. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,038

    Johnny Gee
    Member
    from Downey, Ca

    Then you have it all figured out. Good luck
     
  18. Not really. Still tryin to figure out the trans.

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  19. carbking
    Joined: Dec 20, 2008
    Posts: 3,918

    carbking
    Member

    And that is before adding the 500 CFM Holley ;)

    Company I worked for in 1966 bought a new GMC 1/2 ton with the 305 V-6. All highway miles, 6 MPG!

    Jon.
     
  20. yep the GMC V6 engines where gas hogs. They would out pull bigger engines but use twice the fuel. there was really not much you could do to increase performace or get better fuel economy. With the Hedders and 500 holley you likely will get 2 MPG!
     
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  21. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,694

    56sedandelivery
    Member Emeritus

    Unless you happen across one of the GMC V-12's, basically based on the 305 V-6, and/or you have some Blastolene background, I'd stay away from the 305 V-6. Even the 305 V-EIGHT is hands down a far better engine than the 305 V-6. JMPO. And, the ONLY way your machinist can "make it right", is to replace the 292 with another 292, and I would't settle for anything less. YOU SIR , HAVE BEEN PLAYED!!!!! Your machine shop is full of crooks.
    I am Butch/56sedandelivery.
     
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  22. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,751

    Boneyard51
    Member

    I think your kinda going for the “unusual “ aspect and it’s free and runs. I get it. As stated in other threads that V6 has a ton of torque, smooth as glass, low speed, likes gas. That being said, I go with it, especially if you can gear up a little. Maybe a Columbia. You be the only guy almost anywhere you go with one!

    Bones
     
  23. I'm actually thinking hook up the big V6 to a T5 5 speed fir the OD, and my Banjo has a set of 3.78s in it. My back tires shoukd be right around 30".

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  24. alchemy
    Joined: Sep 27, 2002
    Posts: 22,287

    alchemy
    Member

    Why not use the Y-block that you are getting rebuilt for free? Wait, just, a, second. I bet they don't follow through once they find out how expensive the Y-block parts are going to be. I'm with 56sedandelivery, I think you got took.
     
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  25. Because I picked up a 30 A 3 window and I plan to put the 292 in my dream car...

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  26. alchemy
    Joined: Sep 27, 2002
    Posts: 22,287

    alchemy
    Member

    If you have a 30 coupe with only 3 windows you have a VERY rare car. Or is it a sport coupe?
     
  27. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,509

    Unkl Ian

    Did they use lube, when they fucked you ?
     
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  28. Sorry, it is a sport coupe.

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  29. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,509

    Unkl Ian

    Probably more than one reason,
    why those big V6 motors never got popular for hotrods or racing.
     
  30. F&J
    Joined: Apr 5, 2007
    Posts: 13,281

    F&J
    Member

    could it possibly be......a logy, very unresponsive, low revving, very heavy, gas pig?

    china will gladly take all we can ship..

    They were such an abortion design, that you cannot imagine how GM put a PG behind that lump... It still had a huge, heavy cast iron flywheel with a bizarre flex plate to that...then the later ones for the TH400..got even a more unreliable flex plate prone to cracking from that vibrating lump of a motor.. ...pure junk.

    ..
     
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