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biggest straight six swap

Discussion in 'The Hokey Ass Message Board' started by motorossi, Dec 31, 2011.

  1. I defy anyone to say this 302 doesn't sound amazing. Stick with a 292 or 302 if you can find one and build it & enjoy. Here's some motivation.

    http://www.youtube.com/watch?v=mJOZ3IFuOOI


    A built 250 is fun, but you want some more cubes since this thread is titled "Biggest Straight Six Swap" not "Most obscure modern import six swap." :p
     
  2. inlinr6
    Joined: Oct 27, 2009
    Posts: 344

    inlinr6
    Member

    sounds interesting...
     

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  3. sic944t
    Joined: Apr 23, 2008
    Posts: 81

    sic944t
    Member
    from ohio

    there was a guy in the classified section in the last few days with a very nice rebuilt 292 chevy for 650 $ in missori thats a great option look into that
     
  4. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    thats true but i havent found any 292 ive only seeen 250 so thats why
     
  5. A 235 or 261 is a striaght bolt in, a 250 or 293 you would need to fab up mounts to make fit but should not be a big deal the 302 is a bolt in as its based of the old 235 style bock but you will have clearance issue ...maybe as it is taller.

    I am building a 261 out of an american truck,it has solid lifters and the same cam used in the early 'vettes. Also picked up some speed goodies along the way. These engines can be built strong and on a budget as there is tons of used stuff and new stuff is being reproduced as well.

    Check out tom langdon,stovebolt or inliners for tons of info on these engines. And stay inline.
     
  6. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    can i get good power out of a 235? i found one for 300
     
  7. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,302

    gimpyshotrods
    ALLIANCE MEMBER

    If you move the radiator forward, and cut the firewall a bit, I am certain you could get the Hall-Scott in there. Being able to check bores for roundness using your own head is nice. At 1091 cu. in. I think that is about as big as you're going to get in a straight 6.
     
  8. need louvers ?
    Joined: Nov 20, 2008
    Posts: 12,903

    need louvers ?
    Member

    A couple of carbs on a swap meet manifold and some Fenton cast iron headers will make a ton of difference with a basically stock engine. You can go further with shaving the head, doing a cam, porting, what ever but in compairison to a 216, yes. If it was mine, I would eventally do a five speed behind it, too. Doesn't add horse power, but with the gears equally spread out and stuff running in it's happy range, PLUS an overdrive you'd swear that it did!
     
  9. captainjunk#2
    Joined: Mar 13, 2008
    Posts: 4,420

    captainjunk#2
    Member

    a 270 or 302 GMC would be shweet , some dual carbs a set of split exhaust manifolds or headers
     
  10. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    whwell i was thinking of doing a auto tran with lokar shifter what tranny has overdrive? do some sbc trannys mount right up, like 700r4
     
  11. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    i found a 250 bored but the guy isnt sure what bore it is
    is that a problem or i can re bore it i guess
     
  12. Dan in Pasadena
    Joined: Sep 11, 2009
    Posts: 867

    Dan in Pasadena
    Member

    Gawd, ain't THAT true! If this thread doesn't show that nothing does...Ford in a Chevy, Toyota (wtf?) in a CHevy, or hop down to your local time machine and find a Hudson straight six with a slew of spare parts too!:D

    If I were doing a six, it'd be a 292 no question.
     
  13. I had a 292 chivvy 6 in my old 68 chevy shortbox...clifford intake with a small q-jet and clifford headers with an HEI and overdrive tranny.....Loved it! Er, don't expect to get anything over 17 MPG.
    Keep in mind 292s are a 7 main bearing engine like a ford 300 but a pickup bellhousing will accept any ol GM stick tranny..including the aluminum chevy pickup 4 speeds with a 5th over...and/or a muncie or a T-5. I used an old 55 chevy passenger car 3 speed overdrive with a toggle switch for 6 forward speeds.
     

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  14. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    ya i would do a 292 but i cant find any around cali
     
  15. I found mine at the shop that serviced a name brand potato chip truck fleet...they changed over to all diesel and left their brand new 292 at the shop...told the shop owner [a buddy] to get what he could for it...heh heh...he got a hunnert bucks.
     
  16. need louvers ?
    Joined: Nov 20, 2008
    Posts: 12,903

    need louvers ?
    Member

    An over drive auto like a 200r4 or 700r4 will bolt up to a 250 or 292. The 235 or 302 options could be accomodated with an adaptor from Buffalo enterprises.
     
  17. motorossi
    Joined: Jul 4, 2011
    Posts: 18

    motorossi
    Member
    from jackson ca

    ok that sounds good
     
  18. Hot Rod Magazine ran an article once on converting a 292 Chevy to a overhead cam using the 66-69 Pontiac setup. I don't remember it being very hard. If anyone knows which issue it is in, let me know and I will try to look it up. I have just about every HR mag back to 1950/51.
    I had a new 1967 Sprint with the 230 cu in 215 HP which came stock with a AFB? four barrel and I believe 10½ to 1 compression. Nice engine and decent performance and it got up to 22 MPG. A 292 would be that much better and performance parts are readily available for the OHC 6. The only known problem with this engine was the early cams (1966?). My 1967 was still good at 90,000 plus miles. The drive belt never stretched or went bad either.
    This way you will at least keep it all GM.
     
  19. Ned Ludd
    Joined: May 15, 2009
    Posts: 5,386

    Ned Ludd
    Member

    Nobody's said it yet, for some inexplicable reason: Jaguar XK. Not up there with the biggest, capacity-wise, but at 258 cu. in. a tad bigger than the stock sort of range. A lot more tuning potential, though, and easy up to a point; and it's comfortably within the traditional period.

    [​IMG]
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    Last edited: Jan 31, 2012
  20. 'Mo
    Joined: Sep 26, 2007
    Posts: 7,432

    'Mo
    Member

    What year is that 235?

    There were two basic versions of the 235. The early ones were splash oiled, and not an option. Starting in '53 (in some models), Chevy introduced a much improved, full pressure-oiled 235. This swap has probably been done a million times.

    As was mentioned, twin carbs (and pipes) will wake it up. The head
    is not simply milled, however, as it requires sinking the intake valves a like amount.

    I believe the swap is covered on Langdon's website.
     
  21. Chuck Lloyd
    Joined: Jan 20, 2012
    Posts: 45

    Chuck Lloyd
    Member
    from Va

    Why is it wrong to put a ford in a chevy ... You guys have been putting chevys in fords for 100 years..... Is that whot they call double standers or somthing like that.
     
  22. Chuck Lloyd
    Joined: Jan 20, 2012
    Posts: 45

    Chuck Lloyd
    Member
    from Va

    :)Hi from Va. Whot ever motor u go with make it your choice Do take a look at the 300 ford .They are strong & easy to find,Try to find a industrial moter or one from a dump truck it will have a steel crank . The fuel injected ones are also good with 5 speed
    I have one board to 322 ci Hulmen/moody cam & 2 autolight 2v carbs runs good. Call Clifford Performance Ask for Larry customer service Good luck man.
     
  23. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,756

    Rusty O'Toole
    Member

    OK let's be a little practical. What engine will bolt into a 1940 Chev? First of all any Chev 6 from 1937 to 62 is pretty much interchangeable. They came in 216 and 235 sizes, get one of the ones with insert bearings and full pressure oiling, 1953 and up I think?

    Next choice, 270 or 302 GMC from the 40s and early 50s. Classic choice, longer than the stock engine but not too hard to fit in.

    Often overlooked the 261 GMC early 50s to 1962. Work great in a Chev, as they are based on the 235.

    62 up 230,250, 292 Chev 6. Almost a bolt in. There are 2 transmissions used from 1941 - 54, one is drilled the same as a 55 up Chev. If you get one of those, the late model Chev 6 will bolt up to your trans. For that matter a V8 will too.

    Any of these will work well in your car, the 292 is found only in trucks. By using a six you will be less likely to blow your trans or rear axle.

    I would lean toward the 292 or 250 as they are newer, easier to find, easier to get parts for. But would not turn down a 261. The others are good too but smaller (216,235) or harder to get and harder to get parts for (270, 302 GMC).
     
  24. jhutch713
    Joined: Apr 18, 2011
    Posts: 207

    jhutch713
    Member

    Last edited: Mar 15, 2012
  25. oldcarfart
    Joined: Apr 12, 2005
    Posts: 1,436

    oldcarfart
    Member

    OHC pontiac (Sprint?) w/ factory 4 bbl. manifold.
     
  26. Big T
    Joined: Aug 29, 2006
    Posts: 638

    Big T
    Member
    from Florida

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