Fresh 454 I might buy, what do you think?

Discussion in 'Engine Topic' started by sinnyz_me, Aug 19, 2017.

  1. badazz81z28

    badazz81z28 Veteran Member

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    They are ok heads, but they are truck/smog era heads. The large oval and rectangle ports were the performance heads.
     
  2. Zspoiler

    Zspoiler Veteran Member

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    So basically its a truck engine. Made for torque not power.
     
  3. sinnyz_me

    sinnyz_me Veteran Member

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    Ok so not something you'd drop in a Camaro. Well, guess I'll have to pass on this deal, seemed to good to be true.
     
  4. Zspoiler

    Zspoiler Veteran Member

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    There is an old saying when a deal sounds to good to be true.Its usually is. Good luck on you search.
     
  5. Da_Raabi

    Da_Raabi Veteran Member

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    Well, you could lol...

    14046047_10154350334000140_6081242674846026253_n.jpg
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  6. budro6968

    budro6968 Veteran Member

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    There is a difference between a truck block and a passenger block. It will have the letters cast in the front and rear with Hi perf Pass if it is a passenger block. The truck blocks Have taller decks and possibly gear driven cam. It is not likely that engine is a truck block. DA_Raabi got his from a motor home but I bet it is still a Passenger block.
     
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  7. fatkid_racing

    fatkid_racing Veteran Member Lifetime Gold Member

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    Plenty of misinformation in this thread.
     
  8. cadillac_al

    cadillac_al Veteran Member

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    Truck and motor home 454's can make a nice foundation for a decent engine. I see them all the time for $500-800. That's the only reason why I wouldn't pay $1500 for one. If it had a professional rebuild then maybe. I plan to put one in my Impala convertible. 90% of my driving is between 2-3k rpm so a truck engine will actually fit the bill. It will have the big block sound for putting around town and I don't need a lot of revs. It wouldn't be so fun in a Camaro.
     
  9. budro6968

    budro6968 Veteran Member

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    If there is something you see that is incorrect you should point it out so all can learn from mistakes.
     
  10. fatkid_racing

    fatkid_racing Veteran Member Lifetime Gold Member

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    First off a Mark IV 454 block is a mark IV 454 block. 90% are going to carry the hi perf pass designation. The were pretty much the same from 1970-1990-ish. Even the cast crank low compression truck motors have gobs of potential. There's a lot of myths about the truck motors, fact is the motors are the same across platforms until you get into dump trucks, busses, RVs and the likes. So the 454 in grand dads 1974 camper special is the same 454 in your uncles 1974 corvette. Peanut port heads weren't even a thing until the 80's. While they don't win any races on the flow bench they benefit from higher port velocity and slightly smaller chambers than the 781/049 castings that are so revered. While the peanut port castings remain open chamber they do have a little bit of a quench pad under the spark plugs. Even with peanut ports and 8.5:1 compression there's plenty to be had up to about 5500 RPM.

    Now for the OP's question I'd have a hard time buying any motor from someone that isn't an engine builder. I might consider one if they had a run stand and you could observe its manners at operating temperature. I too have doubts about the 400 horsepower claim, but it certainly isn't impossible as equipped.

    Attatched is a print out of a stock style rebuild on a "truck" 454 with a custom ground hydraulic roller, untouched 781 ovals and a holley 950. I'd like to see how much the numbers change with a set of peanut ports, but I'd be willing to bet the difference would be minimal.
     

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