Questions about Big Block Chevy Tall Deck Engines

[Jim Davies]

On Fri, 6 Nov 1998, Gwyn Reedy wrote:

>  2. What is the purpose of the tall deck engines used in trucks? 
>  Bore and stroke are the same as passenger engines (standard deck 
>  height)so is it for better water circulation?
>  
They use an extra compression ring thus a taller piston

>  4. Known differences: pushrods are longer, intake manifolds and 
>  water pumps are different to allow for better cooling.
>  
>  Hope there is some engine historian out there who can help me out 
>  on this. I'm trying to put together a 1970 C-50 truck with a 427 
>  engine. The block and crank may be bad on this one (I haven't 
>  taken it apart yet) but I know where to get several 366 engines. 

IIRC, the only differences between a 366 and a 427 are:

pistons
rings
block

dont know about balance, but I suspect they did a Chrysler and the thus
the total piston bob-weight is the same for both engines.