Questions about Big Block Chevy Tall Deck Engines

[H. J. Zivnak]

The 366 and 427 medium/heavy truck block has a deck height of 10.2", the
396, 427,454 light truck/car block is 9.8"

Joe

-----Original Message-----
From: Sandy <sganz at wgn.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Saturday, November 07, 1998 2:16 PM
Subject: Re: Questions about Big Block Chevy Tall Deck Engines


>I don't remember if the rods were longer in the Truck motors, but I know
>that they used a 4 ring pistons and that was the reason the extra height
>was needed in the deck. I don't thing the deck was 1" taller, less, but not
>100%.
>
>Sandy
>
>At 11:54 PM 11/6/98 -0500, you wrote:
>>I'll try & find it in print for you, but my "8 track" era brain recalls
the
>>366, 396, 402and 427 truck and car haveing the same
>>crankshaft demensions, while all the high decks had forged
>>ones.  High deck engines had longer connecting rods to
>>compensate for the one inch higher deck, and reduce piston
>>skirt side loads..  4 bolt mains, thicker decks and cyl walls.
>> The 366 heads were terrible from a flow standpoint.
>>HTH
>>BTW,  8-tracks rule!
>>
>>
>>> 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.
>>>   Want to figure out if I can put a longer stroke crank in a 366
>>>   (and what displacement will it give) or if I can slip a 454 block
>>>   under the 427 truck heads and manifold.
>>>
>>