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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> Is that a 427 or 396 block?
Post Info TOPIC: Is that a 427 or 396 block?
koolconvertible


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Is that a 427 or 396 block?
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hi gurus! mate has a BBC. Numbers tell us 396/427,  corvette

Any secret way of telling whether a block is 396 or 427 without taking apart and measuring bore? Thanks!



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cutting a roof off a four door is NOT a convertible.....

65 Parisienne convertible.one of 49 built for RHD export market,402BBC, T400, 2500 stally, posi rear, upgraded brakes with front discs, FUEL FAST efi custom built by me.
JC2+2


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Should be able to by casting number and or stamping number.



-- Edited by JC2+2 on Sunday 1st of October 2017 09:57:54 PM

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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).
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4SPEED427


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Yes, I don't know of any casting number that is shared by both displacements. It should be unique for each size.

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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)
JC2+2


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Carl Stevenson wrote:

Yes, I don't know of any casting number that is shared by both displacements. It should be unique for each size.

 I didn't think so either but according to my Chevy V8 Casting Number book in 1966 they share number 3855961. I guess if you have that number then you have to use stamping numbers. 



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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).
4SPEED427


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I see what you mean, I looked on mortec.com and it's there too.

It seems odd that you never hear talk of getting one of those in a 396 configuration and boring it out to a 427 if that's the case. And I have no doubt it is, GM sure should know and Mortec is normally bang on with their stuff too.

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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)
koolconvertible


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Bit frustrating! How do we tell from stamping numbers?



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cutting a roof off a four door is NOT a convertible.....

65 Parisienne convertible.one of 49 built for RHD export market,402BBC, T400, 2500 stally, posi rear, upgraded brakes with front discs, FUEL FAST efi custom built by me.
4SPEED427


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This site is great. You can find this code on the front of the block, just in front of the passenger side cylinder head.

www.nastyz28.com/chevy-engine-code-stampings.php

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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)
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
koolconvertible


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Nice, thanks carl, will give it a try!



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cutting a roof off a four door is NOT a convertible.....

65 Parisienne convertible.one of 49 built for RHD export market,402BBC, T400, 2500 stally, posi rear, upgraded brakes with front discs, FUEL FAST efi custom built by me.
67curves


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     I have that # as a 1966-1967  396 2 bolt main 



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67curves


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67curves wrote:

     I have that # as a 1966-1967  396 2 bolt main 

          number is 1966 only 427 2 bolt main.   



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pontiax


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image.jpeg



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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb  of torque.

 
4SPEED427


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Any luck with this Phillip?

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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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