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-   -   dimension difference between big and small block chevy (https://www.racingjunk.com/forums/showthread.php?t=24690)

fsdragster 06-21-2009 06:36 AM
dimension difference between big and small block chevy
 
besides the weight of the big block is the overall width or length different between them. car had a small block with front plate and looking to go bigblock. thanks

Tod74 06-21-2009 07:43 AM
They are a lot wider. It is the cylinder heads more so than the block.

Drtmod5 06-21-2009 07:57 AM
They are also @ 3-4" longer in front of motor mounts. I switched mine a couple seasons ago & everything bolts up the same except the front is now closer to the radiator.

fsdragster 06-21-2009 08:47 AM
so the clearance to the firewall is the same its the front that changes. my car came with a small block plate. do i alter that or just buy a new one

hammertime 06-21-2009 08:59 AM
Originally Posted by fsdragster
so the clearance to the firewall is the same its the front that changes. my car came with a small block plate. do i alter that or just buy a new one
you'll have to buy new

desoto30 06-21-2009 11:12 AM
^^ & move it forward 2"

hammertime 06-21-2009 11:14 AM
Originally Posted by desoto30
^^ & move it forward 2"
x2 they are 2 " longer

desoto30 06-21-2009 11:17 AM
Just thinking, sometimes you are able to cut out the front plate to accomodate the BB. sometimes not depends how the first is made.

fsdragster 06-21-2009 02:58 PM
THANKS FOR ALL THE EXPERT ADVISE. HAPPY FATHERS DAY TO ALL. FRANK


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