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Canadian Poncho Homepage -> Canadian Poncho -> Beaumont Power Train Tech Forum -> 427 or 454
Post Info TOPIC: 427 or 454
midlife


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427 or 454
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Slowly rebuilding car I currently have a 454 4 bolt that's outtake a 76 tow truck that was running on propane....a friend wants this motor and has a complete running 427dilemma?

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4SPEED427


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427 for the win every time!

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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65 SD L79


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midlife wrote:

Slowly rebuilding car I currently have a 454 4 bolt that's outtake a 76 tow truck that was running on propane....a friend wants this motor and has a complete running 427dilemma?

 427 car engine or a tall deck?



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JC2+2


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That 454 must be a late 80's - early 90's TBI engine. All '76 were two bolt as far as I know.

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seventy2plus2


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Is the 427 a true 427 according to the casting #'s? Some people take a 454 block, put in a 396 crank and call it a 427 (because that's what it's now displacing). But the casting #'s will always show it as a 454, not a 427.

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65Camino


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Go big or go home.
Cubic inches rule.

454 all the way.

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66 327 sd


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Carl Stevenson wrote:

427 for the win every time!

 X2... folklore!!



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cdnpont


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427 rolls off the tongue better than 454.



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midlife


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Was guessing at the year of truck but it is four bolt main and not sure on 427 guess I should get numbers off motor and check

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long stroke


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66 327 sd wrote:
Carl Stevenson wrote:

427 for the win every time!

 X2... folklore!!

 Unless you are talking about a 1970 LS6 454............... then that is a different story. 



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4SPEED427


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midlife wrote:

Was guessing at the year of truck but it is four bolt main and not sure on 427 guess I should get numbers off motor and check




Yes, the casting number would be great. If it's a car 427 and a four bolt main, it would have been a 425 horse originally.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Mike Ward MB


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Depends on what you are looking for.

For nostalgia sake and a few bucks more per hp, a 427 is your choice.

For raw hp and tire shredding torque its a 454.

My 454 build is fresh off a dyno break-in. 557 ft.lb @ 3200 rpm, 449 hp @ 5000 rpm.

More or less a budget build with some thump to it for my 72 Nova. I had a 454 in the shed with most of the peripherals in hand so 454 was a no brainer for me, but to be honest I never considered going 427.

As others said, you have to check casting numbers to see what actual options you have.



-- Edited by Mike Ward MB on Saturday 3rd of November 2018 10:28:29 PM

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73SC


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midlife wrote:

Slowly rebuilding car I currently have a 454 4 bolt that's outtake a 76 tow truck that was running on propane....a friend wants this motor and has a complete running 427dilemma?

 The fact that your friend wants the 454 and is offering a running 427 should tell you something right there. Nonetheless a 427 is more in keeping with your car and era. 



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4SPEED427


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Nope, big bore but the shorter stroke for the win every time!

Especially after that ride I had in this month's feature car a couple of weeks ago. He revved that 427 up real nice!!!

(This is one of those topics that will never have a winner...)

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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