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Thread: Tall Deck 427 ??? Any Good ???

  1. #1
    Junior Member SHOW GUEST
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    Jun 2004
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    Tall Deck 427 ??? Any Good ???

    I'm not much of a mechanic, so I'll just ask a silly question. I found a complete tall deck 427 Chevrolet (suposedly it runs good) Anyway, are they worth anything, or are they boat anchors??? Thanks for any input. :?: :roll:

  2. #2
    Member JUNIOR BUILDER
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    Make sure it is not a 366. The 366 is junk.

    You can have some fun with the old 427.
    CDR Performance
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    If you have never experienced fear your car isn't fast enough.

  3. #3
    Administrator RACING JUNKIE
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    If thats an old truck engine I wouldn't use the pistons that are in it,they are the 4 ringed pistons,junk as far as I am concerned,the 4 ring pistons
    There Is 1 Thing Better Than Cubic Inches,,,More Of Them

  4. #4
    Senior Member EXPERT BUILDER
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    Dec 2006
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    272
    as stated, tall deck 427s were/are truck blocks. Dont use the pistons and i seem to remember the head ports were quite small, but these blocks can make a nice street motor, or these days with all the goodies you can buy for them, an excellent race motor.
    If what you found is indeed just a truck motor, then do not use it in stock form, it needs to be gone over...
    Ed

  5. #5
    if it is a truck tall deck 427 then you can take and install a 4.25 stroke bbc crank and stock 454 pistons then run a 6.385 rod i think . hopefully someone will correct me if needed. a friend of mine built one with stock .30 over 454 pistons a 4.25 crank and either stock lenth rods or 6.385 rods and it worked great . it save him lots of cash to not have to buy 496 pistons. makes a nice 500 cube engine

  6. #6
    Senior Member DYNO OPERATOR
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    VA Hospital, Dallas, Tx (214 302 1924) cell-972-464-7400
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    My opinion is that it is a great low cost base for a strong stroker engine. You can easily install a 4.250 stroke crank with not a lot of grinding. You can install a 4.375 crank with more grinding for clearances. Guys that are good have put 4.50 strokes in them but that is trickey to do.

    You can use a 454 4.00 crank by grinding some and by using a set of 6.385 rods Corrected by DCarr. It is in fact the 6.535 rod. you can use a factory 454 piston.

    That block is cpable of 427 - 433 - 440 - 452 - 454 - 461 - 477 - 482 - 496 - 509/510 - and up to 540 cu inches.

    It was THE HARD CORE RACE block in the older days, before Dart, World etc. The block will handle a ton of hp with only minor block prep. I mean well over 1,000 hp and I have seen them live at 1,400 hp after they were fully prepped and filled.

    Can you believe all the garbage I just wrote. I find it hard to believe too, but I have done it many times.

    It is .400 taller than the standard block. iT was the first 10.200 block.

    Ed
    " Let all things that hath breath, praise the Lord. Praise Ye the Lord" Psalms 150 vs 6.

  7. #7
    Member JUNIOR BUILDER
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    Are you guys sure its a 6.385 rod w/ stock piston and not a 6.535" ?

    .400" taller deck would require a .400" longer rod ...........................

    I recently ran one that was .125" over w/ 4.250 stroke

  8. #8
    Senior Member DYNO OPERATOR
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    Don,
    You are correct. It is the .400 rod. I guess I am having brain fade.

    Ed
    " Let all things that hath breath, praise the Lord. Praise Ye the Lord" Psalms 150 vs 6.

  9. #9
    Junior Member APPRENTICE
    Join Date
    May 2007
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    LAFAYETTE,LA.
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    427 tall deck

    I RUN A 427 TALL DECK IN MY MUDRACE TRUCK W/454 CRANK& PISTONS W/6.985 ALUM. RODS . THIS MOTOR IS A SCREAMER,IF I WAS YOU I WOULD GET THE MOTOR YOU CAN DO A LOT WITH THIS BLOCK. I ALSO WOULDN'T USE THE ORIGINAL HEADS ,USE SOME 990 HEADS OR SOME GOOD ALUM. HEADS.I'M USING AFR CNC HEADS AND HAVE NO COMPLAINTS.

  10. #10
    Make sure to buy the correct intake, one for a 10.2 tall deck block.


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