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Thread: Small Block or Big Block Chevy Swap

  1. #11
    Join Date
    Dec 2003
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    Giddings, Texas
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    A fuel injected LT1 is a lot better than a carbed big block in 99% of the situations you are going to have this truck in. Try to find an overdrive transmission. Otherwise, you will never see the positive side of 10 mpg.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

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  2. #12

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    Quote Originally Posted by Barrman View Post
    A fuel injected LT1 is a lot better than a carbed big block in 99% of the situations you are going to have this truck in. Try to find an overdrive transmission. Otherwise, you will never see the positive side of 10 mpg.
    What would be a good overdrive trans? I would like to keep it a cluch though.

  3. #13
    Join Date
    Sep 1998
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    North Central Wisconsin
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    11,520

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    NV4500 is the best choice out there....
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  4. #14
    Join Date
    Dec 2003
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    Giddings, Texas
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    NV4500 or the 3052 over drive from M35A2 trucks. Several members have had success with one or the other. You need a specific bell housing to mount either the NV4500 or the 3052. They won't work without the right one for the transmission.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  5. #15

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    Tim, 3052 is non O.D. The 3053a is the O.D. Thats what I got waiting for my swap.

  6. #16
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    I couldn't remember if it was a 3052A or 3052A1, so I just called it an overdrive 3052. Sorry for any confusion.

    The way to tell overdrive Duece transmissions from non overdrive ones is the shift pattern. If the pattern looks like a normal 5 speed pattern, then it is a non overdrive. If 3rd and 4th are next to each other on the bottom of pattern, then it is an overdrive. The cases are same on the outside, so try to find one still in the truck and look at the data plate.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  7. #17

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    Quote Originally Posted by Barrman View Post
    I couldn't remember if it was a 3052A or 3052A1, so I just called it an overdrive 3052. Sorry for any confusion.

    The way to tell overdrive Duece transmissions from non overdrive ones is the shift pattern. If the pattern looks like a normal 5 speed pattern, then it is a non overdrive. If 3rd and 4th are next to each other on the bottom of pattern, then it is an overdrive. The cases are same on the outside, so try to find one still in the truck and look at the data plate.
    Where can i get one of the trans? About how much? Will there be a bellhousing that will fit my 454 bbc to the trans?

    Please reply....

  8. #18
    Join Date
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    There have been several for sale here on the Zone in the last month or so. There was one on E-Bay a week or so ago for $750 or so the last time I saw it. I don't know if it sold or not. Several members here have them as well. They probably know the prices better than I.

    The bellhousing you need is from a C60 or C70 along with select school buses that had 427 or 366 Tall Deck Big Blocks. It has to have an SAE#2 bolt pattern for the transmission. One of our members, Over2land, wrote an article in JP about the conversion a few years ago. He used a lot of information from another member, Spicergear. I have the article at home and need to find it. Over2land and others might show up here to post more.

    The NV4500 also needs the correct bellhousing. If you find one of them, see if you can get the bellhousing too. Try for mid to late '90's 2wd units from Chevy trucks. They have hydraulic slave cylinder/throw out bearing units that are great. Might as well take the master cylinder from the donor truck while you are getting stuff. NV4500's are in the $800-$1200 range.
    Remember if you didn't build it you can't call it yours.

    6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.

    https://www.youtube.com/channel/UCCz...HGkBCfhXZ5iuaw

  9. #19

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    Quote Originally Posted by Barrman View Post
    The bellhousing you need is from a C60 or C70 along with select school buses that had 427 or 366 Tall Deck Big Blocks. It has to have an SAE#2 bolt pattern for the transmission.
    The 3053A as it comes out of the deuce has an SAE #2 bellhousing, you either need the other half of that (the big cast iron part that bolts to the engine) or else you remove the SAE bellhousing piece and then the transmission to the standard C-60 gas engine bellhousing. The housing you are looking for has a bolt hole at the bottom where it bolts to the transmission which will allow it to bolt right up to the 3053A.

  10. #20
    Join Date
    Dec 2006
    Location
    Dallas, Texas
    Posts
    12

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    There are 2 Spicer 3053 transmissions on ebay now. They are in Michigan. Search Spicer transmission.

    Don

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