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Thread: 1975 454?
          
   
   

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  1. #1
    mrbigg is offline CHR Member Visit my Photo Gallery
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    1975 454?

     



    I just picked up a 1970 Monte with a 454 in it. Was told it's a '75. I'm assuming the casting numbers for the heads are under the valve covers like a small block but I was wondering if the block numbers are on the bellhousing like a small block also?

  2. #2
    siw234 is offline CHR Member Visit my Photo Gallery
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    left side on block

  3. #3
    Grumpy 427's Avatar
    Grumpy 427 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 1977 camaro
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    By 1975, there were no performance parts on those 454 motors. I just picked one up for my Chevelle, it has a fresh rebuild in it, but its a daily driver. 8.25-1 compression with the small port truck heads. The guy did however put in an Rv type cam and a double roller timing chain. i added a wiend Stealth dual plane intake a set of headers and a 750 vac holley. See what i get out of it. as long as i have passing power on the highway i will be happy.
    9.65 @ 137 MPH 1.39 60' More left in the car.

  4. #4
    mrbigg is offline CHR Member Visit my Photo Gallery
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    I'm wondering what this motor come out of myself. It has an Edelbrock intake and a spreadbore Holley. I just put new plugs, cap, and rotor in it and it's running alot better. I can tell it has a mild cam in it. When I drove it home it was running like crap and still would bark the tires going into second gear. Valves need adjusting but I'm thinking of swapping the cam out to a new Comp stick. I'll wait till spring and figure out what I'm going to do.

  5. #5
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    Gusaroo is offline CHR Member Visit my Photo Gallery
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    Keep us posted MRBIGG. I too have a newer 454 (out of a tow truck) that has a fresh rebuild on it. I am going to drop it into my 60 BleAir, but might throw a cam similar to yours before I do. Will also add headers , intake and carb as well. I am anxious to see how it will run.

  6. #6
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    astroracer is offline CHR Member Visit my Photo Gallery
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    Here is a site to check your numbers against...
    http://www.nastyz28.com/bbcmenu.html
    It will get you in the ballpark.
    If money is the root of all evil... Women must be the fertilizer...
    Link to my BAD AST Build Thread:
    http://www.clubhotrod.com/suspension...van-build.html

  7. #7
    mrbigg is offline CHR Member Visit my Photo Gallery
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    Thanks for the link. Here's what the heads are-3904390 1966-67 396/427 Closed . 325, 350 L-34/L-35 390, 400, L-36/L-68 98.4cc. Are these heads decent?

    Couldn't read the bellhousing numbers but I found the numbers on the passenger side of the block, under the alternator. That number is T1100CXX, plus some smaller numbers. Can the block be identified with this number?
    Last edited by mrbigg; 11-07-2006 at 05:45 PM.

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