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Thread: newbie with a 402
          
   
   

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  1. #1
    85SuperChev is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 85 Chevy Stepside
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    newbie with a 402

     



    Well i'm brand new to the forum thing and the Big Block too. I recently bought an 85 chevy stepside with a 402 BBC. Now the guy i bought it from said it's a straight 402 and not a 396 bored out. I havent a clue about it. He also said the tranny is a 700R and it has a posi rear end. Thats about all i know about it. Anything anyone can say would be greatly appreciated. Thanks!!

  2. #2
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
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    nope i did not build it very hard to say what if any been done to it... i can not tell you much the bore from a 396 to a 402 is only 030 many ways to go on heads pistons cams . so if you did not get numbers then it any one guess
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  3. #3
    CapeCodRon is offline Registered User Visit my Photo Gallery
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    Hello, 85SuperChev, I have the Chevy by the numbers books. If you give me any casting numbers from your block, heads, or what not, I can give you the year and model vehicle it came from. I have a 70 402 in my 68 SS Camaro. Well, it isn't in there as we speak, but, it is all over the garage and the car is an empty shell. If you wish I'll run the numbers if you post them here. My books only run, 55 thru 75 so those are the only years I can assist you with. From what my book reads, the 402 was only produced for 3 years 1970 to 1972. Sorry can't help you with the tranny or rear end, but they all have casting numbers, and you can ask here, or "google" them and I am sure you'll get an answer!

    CapeCodRon

  4. #4
    sleeve396's Avatar
    sleeve396 is offline CHR Member Visit my Photo Gallery
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    Well, like Pat says Hardly any real difference between those 2 but if he said u have a straight 402, I am willing to bet he meant a 1974-72 block, best way is to look at the engine stamped code that is on the end of the block. on the pad just under the alternator, assuming that is the passenger side of the truck. My guess you will find a CLB code motor

  5. #5
    pat mccarthy's Avatar
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    Quote Originally Posted by sleeve396 View Post
    Well, like Pat says Hardly any real difference between those 2 but if he said u have a straight 402, I am willing to bet he meant a 1974-72 block, best way is to look at the engine stamped code that is on the end of the block. on the pad just under the alternator, assuming that is the passenger side of the truck. My guess you will find a CLB code motor
    .. i put both my hands on the valve covers and can tell you how much power them BBC can make
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  6. #6
    sleeve396's Avatar
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    Thats not how Pat does it.........He puts both hands on the valve covers, begins mumbling, chanting, sweating, then he commands!! HORSEPOWER EXORCISM......suddenly your baby rat will have balls.....Big Un's!!

  7. #7
    85SuperChev is offline CHR Member Visit my Photo Gallery
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    Thanks guys for the info... i recently came across some more info on the truck and its got an edelbrock 750 carb on it and apparently has a 3/4 cam set up in it also. Has a 700R tranny in it with a shift kit. Im gonna get the numbers off the block next time i get under it and see what it says and post it on here.

  8. #8
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    Quote Originally Posted by pat mccarthy View Post
    .. i put both my hands on the valve covers and can tell you how much power them BBC can make
    HMMMMMM, the laying on of hands by Minister McCarthy!!
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  9. #9
    85SuperChev is offline CHR Member Visit my Photo Gallery
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    ok so my uncle whos been a mechanic for years looked at the stamped code just under the alternator and it said T1012CTB... now can anyone tell me anything about this number?

  10. #10
    techinspector1's Avatar
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    Scroll to the bottom of this page....
    Big Block Chevy Engine Suffix Stamping Codes
    The T is Tonawanda factory and the numbers are the date code when it was built.
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  11. #11
    tcodi's Avatar
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    he just meant it came from the factory as a 402, which is the same engine as the 396 but with .030 bigger bores. He must have just meant it wasn't torn down and bored later on. I have the same motor.

  12. #12
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    T1012CTB decodes as follows:
    T=Tonawanda Plant
    01= January
    12= Twelve
    CTB= 1972, 396 and 400 (LS-3)
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

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